get_repo_info

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

With no annotations, the description must carry the full burden of behavioral disclosure. It only says 'Fetch', implying a read operation, but does not disclose return format, potential errors, authentication needs, or what 'quick metadata' specifically includes. This leaves significant gaps.

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 a single, front-loaded sentence with no unnecessary wording. However, it is somewhat under-specified, though not to the extreme of a tautology. It earns a high score for conciseness but loses a point for lacking substance that could justify its brevity.

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?

For a simple 1-parameter tool, the description gives only a vague idea. There is no output schema and no annotations, so the description needs to convey what metadata is returned and how the parameter is formatted. It fails to provide this, leaving the tool incomplete for the agent.

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 input schema has zero description coverage for the only parameter (owner_repo), and the description does not compensate by explaining the expected format (e.g., 'owner/repo'). The parameter name gives some hint, but the meaning is not explicitly clarified, failing the low-coverage compensation requirement.

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 uses a clear verb ('Fetch') and resource ('metadata for a repo'), indicating what the tool does. However, 'metadata' is vague and does not distinguish it from sibling tools like get_repo_stats or get_topics, so it misses the differentiation criterion.

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 the many alternatives (e.g., get_repo_stats, get_contributors). There is no mention of scenarios, prerequisites, or exclusion criteria.

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