explain_repository

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

With no annotations provided, the description carries the full burden of disclosing behavioral traits. It states only that the tool explains a repository in plain language, but does not disclose whether it performs a read-only operation, requires authentication, accesses external services, or has any side effects. The lack of behavioral detail is a significant gap for a tool with no annotation safety net.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is exceptionally concise: a single purpose sentence plus a parameter definition. It is front-loaded with the main action and contains no filler, repetition, or unnecessary detail. Every word earns its place.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Given the tool's simplicity (one parameter, output schema present), the description provides sufficient information to invoke the tool correctly. However, it lacks usage guidance and behavioral transparency, leaving the agent to infer when to use it and what side effects may occur. The output schema mitigates the need to describe return values, but the missing contextual elements keep this from being fully complete.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The schema provides only a string type for 'name', giving no semantic meaning. The description compensates by explaining the expected format: 'repo' or 'owner/repo'. This adds meaningful guidance that goes beyond the schema, making the one parameter clear and actionable.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Does the description clearly state what the tool does and how it differs from similar tools?

The description clearly states the tool's purpose: to explain what a repository is about in plain language, using a specific verb ('explain') and resource ('repository'). However, with the sibling tool 'repository_summary' present, the description does not explicitly differentiate between the two, creating potential confusion about which tool to choose.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Does the description explain when to use this tool, when not to, or what alternatives exist?

The description provides no guidance on when to use this tool versus alternatives. For example, it doesn't explain how 'explain_repository' differs from 'repository_summary' or when a plain-language explanation is preferred over a structured summary. No contexts or exclusions are mentioned.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.