How to use the AI Agent Tool Routing Register agent skill

What does the skill make the agent do?

The skill is for designing or reviewing an AI agent tool registry or an MCP router. It asks the agent to write down each tool's name, server, whether it reads or writes, its parameter schema, the authorization policy, runtime limits, a retry contract and its status. The output is a structured register and a verification plan.

The skill does not build the system. It produces documentation and plans, not working code, and it states that writing a rule down does not make a tool safe.

• Lists the tools an agent may call and the parameters each one accepts
• Sets timeout, rate, concurrency, response-size and cost limits to be approved by the project
• Classifies retries by effect and limits them to a bounded budget
• Lists adversarial test cases such as wrong tenant, denied resource and oversized response
• Keeps status at draft until the required checks have run

How do you install the ai-agent-tool-routing skill?

Download the ZIP file from this page. Then choose one of the following ways to install it.

For a personal setup, unzip the download into ~/.claude/skills/ so the skill is available in all your projects. For a single project, unzip it into that project's .claude/skills/ folder instead.

If you use the Claude apps, you can upload the skill under Settings → Capabilities → Skills rather than unzipping it yourself.

• Personal: unzip into ~/.claude/skills/
• Single project: unzip into .claude/skills/ inside the project
• Claude apps: Settings → Capabilities → Skills, then upload

How do you trigger the skill with a natural request?

You do not need a special command. The skill's description tells the agent to use it when you are designing or reviewing an AI agent tool registry or MCP router. Ask in those terms and name the tools or server you care about.

Good requests say what you are doing and what you have. Mention the tool, whether it writes data, and who is allowed to call it, because the skill asks for these details first.

• Help me document the tools my MCP server exposes, including parameter schemas and who may call each one.
• Review this proposed tool before we connect it to our production agent. It can update customer records.
• Write timeout and retry rules for our existing tool router, including what is safe to retry after a write.
• Draft a test plan for read_document covering wrong tenant, missing ID and timeout cases.

What does the skill need, and what are the safety notes?

The skill lists no requirements. It does not run scripts and does not use the network. You still need to read the real tool schema and your application's identity and permission model, because the skill relies on those to fill in the register.

Schema validation alone does not enforce authorization. The skill says that schema checks do not enforce row-level authorization, path containment or network restrictions, and that the register grants no permission. Treat its output as a draft to test against your actual runtime.

• Requirements: none listed
• Runs scripts: no
• Uses network: no
• Do not treat a checklist entry as proof of a control
• Never log sensitive arguments or full results by default

What does a finished register entry look like?

The skill's worked example describes one read-only tool called read_document. It takes a single document_id, rejects any extra fields such as tenant_id, and takes the caller's identity from the verified session rather than from arguments. It sets an illustrative timeout of 5000 ms and a response limit of 65536 bytes, and allows two attempts retried only on transient unavailability.

The example also states that these limits are illustrative requirements, not measured capabilities. Its status stays draft until the negative checks, such as another tenant's document being denied, have run and their results are recorded.

What tips help you get useful results?

Give the skill the exact tool name and the real schema. It is designed to record observed configuration separately from proposed policy, so tell it which is which. Ask for negative test cases as well as the happy path, because a successful authorized read does not close the negative cases.

Use the output as input for review with the people who own the identity and permission model. The skill suggests related skills such as mcp-builder, mcp-server-security and error-handling-patterns when their scope fits your integration.

• Paste the real schema or describe it precisely
• Separate observed settings from proposed ones
• Ask for failure cases, not only success cases
• Keep the status at draft until tests have actually run