Borrowing it
Nothing to install: this file belongs to dylanroscover/Embody. Take a copy, put it at the same path in your own repository, and replace the rules that are about this project with yours.
curl -O https://raw.githubusercontent.com/dylanroscover/Embody/main/.claude/skills/add-mcp-tool/SKILL.mdgit clone --depth 1 https://github.com/dylanroscover/EmbodyWrote 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.
[](https://agentmods.dev/skills/dylanroscover/embody/add-mcp-tool)<a href="https://agentmods.dev/skills/dylanroscover/embody/add-mcp-tool"><img src="https://agentmods.dev/badge/skills/dylanroscover/embody/add-mcp-tool/github.svg" alt="Measured on agentmods" height="20"></a>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.
<a href="https://agentmods.dev/skills/dylanroscover/embody/add-mcp-tool"><img src="https://agentmods.dev/badge/skills/dylanroscover/embody/add-mcp-tool.svg" alt="Reviewed on agentmods" width="80" height="20"></a>- NVIDIA SkillSpector warn
SkillSpector: 1 finding, up to medium
These are SkillSpector’s own severities. On a checked sample its high-severity flags on skills were ~96% false positives — a documented command, a public API, a “never do X” rule — so we show them as a caution to read, not a verdict. Why →
- medium Agent Snooping · line 26 Skill enumerates or reads other installed skills. Access to other skills' SKILL.md files or the skills directory reveals prompt instructions, capabilities, and secrets that should be invisible to peer skills.Fix: Remove all code or instructions that list or read other skills' files or directories. Skills should operate independently; cross-skill access is a privilege escalation.
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 | $0.00020 | $0.00378 |
| Opus 5 | $0.00010 | $0.00189 |
| Sonnet 5 | $0.00004 | $0.00076 |
| Haiku 4.5 | $0.00002 | $0.00038 |
Grade A, and why
add-mcp-tool 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 10d 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.
What it actually says
Add MCP Tool to Envoy
Steps for adding a new MCP tool:
-
Add the tool function inside
_register_tools()inEnvoyExt.py- Function signature and docstring define the MCP schema (parameter names, types, descriptions)
- Treat these as API contracts - changes break client integrations
- The tool function queues the operation for main-thread execution
-
Add a handler case in
_onRefresh()for the TD operation- This is where the actual TouchDesigner operations execute (on the main thread)
- Wrap TD operations in try/except, return
{'error': str(e)}dicts on failure - Validate all inputs before passing to TD
-
Update
EXPECTED_ENVOY_TOOLSindev/embody/unit_tests/test_agent_contract.py- The Tier-1 agent contract test fails on inventory drift in either direction -- same commit as the tool change
- Tools register on the MCPServer instance at Envoy START -- restart Envoy before believing a mismatch
-
Update the MCP tools reference
- Update the
/mcp-tools-referenceskill in.claude/skills/mcp-tools-reference/SKILL.md - Update the corresponding template DAT if it exists
- Update the
-
Update documentation
- Add to the root CLAUDE.md if the tool is significant
- Update
text_claude.mdtemplate DAT for user projects
-
Test via MCP Inspector or Claude Code
- Verify the tool appears in the tool list
- Test with valid and invalid inputs
- Check error handling
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.
- 10d ago First seen · 37 lines · 20 tokens per session scan A aa08eac7e624
add-mcp-tool is a skill published in the GitHub repository dylanroscover/Embody (170 stars, last pushed yesterday), licensed MIT. It adds 20 tokens to every session and 378 once invoked, about $0.0001 per session on Opus 5. 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 2026-08-30.
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