What is python-mcp-elicitation?

A Python pattern for MCP servers and clients that use safe, server-led forms to collect choices and confirmations.

Use it when building Python MCP tools that ask users to select an item or confirm destructive operations such as stopping a process.

It helps prevent risky actions from running without checking that the client supports forms and that the user confirmed the exact action.

How alonf/MCPPythonDemo configures Claude Code and Codex

Reuse

Borrowing it

Nothing to install: this file belongs to alonf/MCPPythonDemo. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.

Copy the file

curl -O https://raw.githubusercontent.com/alonf/MCPPythonDemo/master/.squad/skills/python-mcp-elicitation/SKILL.md

Clone the repo

git clone --depth 1 https://github.com/alonf/MCPPythonDemo

Made for: Claude Code, Codex.

Wrote this? Show the measurements

A badge with what this costs and how it scanned, read live from this page, so it follows the numbers instead of freezing them. Markdown for a README, HTML for a documentation site or a project page.

README.md

[![agentmods](https://agentmods.dev/badge/skills/alonf/mcppythondemo/python-mcp-elicitation/github.svg)](https://agentmods.dev/skills/alonf/mcppythondemo/python-mcp-elicitation)

Your own site

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Or the 80×15 button, for a site that already has a row of RSS and ATOM ones. Only the verdict fits; the numbers stay here.

Your own site · 80×15

<a href="https://agentmods.dev/skills/alonf/mcppythondemo/python-mcp-elicitation"><img src="https://agentmods.dev/badge/skills/alonf/mcppythondemo/python-mcp-elicitation.svg" alt="Reviewed on agentmods" width="80" height="20"></a>

Per session 0 Skills are progressive disclosure: only the name and description are preloaded; the body loads when the skill is used.

When invoked 522 The whole file, excluding the scripts and references it only reads on demand.

Security scan A 0 findings. A grade says what 26 rules found in the file — not that it is safe.

Origin original No closer match found in the catalogue.

Token cost

What it costs to keep this loaded

Counted locally with the o200k_base tokenizer, which is exact for GPT models; Claude uses its own tokenizer and its counts differ. Treat this as one consistent yardstick across the catalogue rather than a bill. Prices are per million input tokens.

Model	Per session	Once invoked
Fable 5.1	$0.00000	$0.00522
Opus 5.5	$0.00000	$0.00209
Sonnet 5.5	$0.00000	$0.00104
Haiku 4.5	$0.00000	$0.00052

Measured 2mo ago against content hash 70545ed70904, method: parsed. Prices are Anthropic first-party input rates as of 2026-10-07, from the pricing page.

Security

Grade A, and why

python-mcp-elicitation scanned grade A with 0 findings against 26 rules in 11 categories — prompt injection, anti-refusal, data exfiltration, privilege escalation, supply chain, agent snooping, system-prompt leakage, SSRF and excessive agency — measured 2mo ago.

A static scan of the body, not an audit. Every finding is printed with the line that produced it so you can judge whether it matters here. A mod is markdown that instructs an agent; that is exactly why what it instructs is worth reading.

Nothing flagged

None of the 26 patterns this scan looks for appear in this file: no shell pipes, no recursive deletes, no credential paths, no hidden text, no instruction-override or anti-refusal phrasing, no agent-config snooping. That is not a guarantee, it is the absence of the things that are checkable.

.squad/skills/python-mcp-elicitation/SKILL.md · 51 lines

How it starts

The opening of the file, as written. The whole thing — 51 lines — stays where its author put it; the contents beside it link to each section on GitHub.

Python MCP Elicitation Skill

Use When

You need a Python MCP server/client pair to support safe server-driven form elicitation, especially for risky actions like process termination.

Pattern

Server tool
- Accept Context in the tool signature.
- Check client capability with ctx.request_context.session.check_client_capability(...).
- If dynamic form options are needed, call ctx.request_context.session.elicit_form(...) with a hand-built restricted JSON schema instead of relying on static Pydantic models.
Selection step
- Build a single top-level field with oneOf options:
  - const: machine-readable value (PID, identifier, etc.)
  - title: human-readable label for the client UI
- Keep the form flat; MCP elicitation schemas are intentionally simple.
Confirmation step
- Always require a typed phrase for destructive actions.
- Validate exact phrase match server-side, but compare case-insensitively for usability.
Lecture/demo client
- Pass elicitation_callback= to ClientSession(...) only when local interaction is actually possible (stdin/stdout are TTYs).
- In the callback, support:
  - single-field oneOf/enum selection forms
  - single-field text prompts
- Return ElicitResult(action="cancel") on blank input so the server can treat it as a safe cancel.
Linux process termination
- Prefer SIGTERM first, then SIGKILL after a short timeout.
- Treat zombie processes as exited in /proc/<pid>/stat to avoid hanging on child processes owned by another parent.

Reference Files

src/mcp_linux_diag_server/tools/processes.py
src/mcp_linux_diag_server/server.py
src/mcp_linux_diag_server/client.py
tests/test_processes.py
tests/test_m5_http.py

QA Pattern

For integration tests, use a schema-driven callback that inspects the single elicited field and auto-fills:
- matching oneOf / enum path options when present
- True for boolean approvals
- quoted confirmation phrases when the schema description demands exact text
- the requested path or a stable QA reason for free-text fields
This keeps access/approval tests reusable even when the server changes the exact elicitation schema shape but preserves the single-field MCP form contract.

Read the full file on GitHub · 51 lines

Changes

What this file has done since we first saw it

Hashed on every crawl. A supply-chain change to an agent config is a question of when, not whether, so the history is kept rather than the latest state alone.

2mo ago First seen · 51 lines · 0 tokens per session scan A 70545ed70904

Subscribe to this mod's changes

python-mcp-elicitation is a skill published in the GitHub repository alonf/MCPPythonDemo (0 stars, last pushed 6mo ago), licensed MIT. It costs nothing until one of its globs matches a file; then it loads 522 tokens. A static security scan graded it A with 0 findings. No closer match exists in the catalogue, so it is treated as the original; first seen 2026-08-31.

Building agents

python-mcp-elicitation next to 6 skills from other repositories
Mod	Type	Stars	Last push	Licence	Scan	Tokens	Works with
python-mcp-elicitationalonf/MCPPythonDemo	Skill	0	6mo ago	MIT	A	0	Claude Code, Codex
imagegenopenai/codex	Skill	133k	yesterday	Apache-2.0	A	113	Codex
playwright-climicrosoft/playwright	Skill	99k	yesterday	Apache-2.0	A	19	Claude Code
local-ai-agentsmicrosoft/ai-agents-for-beginners	Skill	79k	4d ago	MIT	A	200	Claude Code, Codex
systematic-debuggingobra/superpowers	Skill	313k	3d ago	MIT	A	21	Claude Code
next-cache-components-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	95	Claude Code
next-partial-prefetching-adoptionvercel/next.js	Skill	143k	yesterday	MIT	A	103	Claude Code

MCPPythonDemo: Skill for Claude Code