Borrowing it
Nothing to install: this file belongs to joshrotenberg/tower-mcp. 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/joshrotenberg/tower-mcp/main/AGENTS.mdgit clone --depth 1 https://github.com/joshrotenberg/tower-mcpWrote 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/instructions/joshrotenberg/tower-mcp/agents-md)<a href="https://agentmods.dev/instructions/joshrotenberg/tower-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/joshrotenberg/tower-mcp/agents-md/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/instructions/joshrotenberg/tower-mcp/agents-md"><img src="https://agentmods.dev/badge/instructions/joshrotenberg/tower-mcp/agents-md.svg" alt="Reviewed on agentmods" width="80" height="20"></a>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 | $0.00402 | $0.00402 |
| Opus 5.5 | $0.00161 | $0.00161 |
| Sonnet 5.5 | $0.00080 | $0.00080 |
| Haiku 4.5 | $0.00040 | $0.00040 |
Grade A, and why
tower-mcp AGENTS.md 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.
What it actually says
AGENTS.md
This repo has MCP servers configured in .mcp.json that you can use directly.
Available MCP Servers
tower-mcp-example
Simple demo server with echo, add, reverse tools and a greet prompt.
Resources: source://getting_started.rs - serves its own source code
weather
Weather forecasts via NWS API (US only).
Tools: get_forecast (lat/lon), get_alerts (state code)
codegen-mcp
MCP server that helps build MCP servers.
Tools: init_project, add_tool, remove_tool, get_project,
generate, validate, reset
Resources: project://Cargo.toml, project://src/main.rs, project://state.json
Getting Started
- Read
examples/README.mdfor an index of all examples - Read the
source://getting_started.rsresource to see how a server is built - Run any example:
cargo run -p tower-mcp-examples --example getting_started
Development
See CONTRIBUTING.md for build commands, PR guidelines, and contribution policy.
Project Structure
crates/tower-mcp/src/- Main library codecrates/tower-mcp-types/src/- Protocol types (no runtime deps)crates/tower-mcp-macros/src/- Optional proc macrosexamples/- Example servers and clients (23 standalone.rsfiles)codegen-mcp/- MCP server builder (generates tower-mcp code)conformance-server/- MCP spec conformance tests (48/48 stable; 114/114 final)conformance-client/- MCP conformance client (265/265 checks)
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 · 44 lines · 402 tokens per session scan A cfd77f1b94c3
tower-mcp AGENTS.md is an instructions file published in the GitHub repository joshrotenberg/tower-mcp (12 stars, last pushed yesterday), licensed Apache-2.0. It adds 402 tokens to every session, about $0.0016 per session on Opus 5.5. 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 2026-08-31.
tower-mcp AGENTS.md compared with instructions from other repositories
| Mod | Type | Stars | Last push | Licence | Scan | Tokens | Works with |
|---|---|---|---|---|---|---|---|
| tower-mcp AGENTS.mdjoshrotenberg/tower-mcp | Instructions file | 12 | yesterday | Apache-2.0 | A | 402 | Codex, OpenCode |
| vscode buildNext.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 9,719 | GitHub Copilot |
| next.js AGENTS.mdvercel/next.js | Instructions file | 143k | yesterday | MIT | A | 7,461 | Codex, OpenCode |
| langchain AGENTS.mdlangchain-ai/langchain | Instructions file | 149k | yesterday | MIT | A | 4,680 | Codex, OpenCode |
| vscode oss-third-party-notices.instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 5,516 | GitHub Copilot |
| vscode copilot-instructions.mdmicrosoft/vscode | Instructions file | 195k | yesterday | MIT | A | 3,093 | GitHub Copilot |
| deepseek-harness AGENTS.mddeepseek-ai/deepseek-harness | Instructions file | 274k | 2d ago | MIT | A | 4,313 | Codex, OpenCode |