compare_repos

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

Without annotations, the description fails to disclose important behavioral traits: no mention of return format, data freshness, max comparison size, or safety (read vs write). The single line 'Free feature' adds no behavioral clarity.

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?

Single sentence is brief but lacks structure. It conveys core purpose without waste, but could benefit from additional context in a structured format. No bullet points or additional details.

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?

Despite simplicity, the description lacks crucial details about the comparison output and behavior (e.g., what does the tool return? how is activity measured?). With no output schema, the description should compensate but fails to do so.

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?

Schema description for repos parameter is clear (format owner/repo), and the tool description does not add further meaning such as example values or constraints (e.g., min/max count). Baseline score of 3 applies due to high schema coverage.

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?

Description states specific verb (compare) and resource (multiple repos) and metrics (stars, forks, activity), clearly differentiating from siblings like analyze_repo (single repo analysis) and track_star_growth (specific metric tracking over time).

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?

Description provides no usage guidelines, no indication of when to use this tool instead of siblings like analyze_repo or find_similar_repos. The 'Free feature' note is irrelevant to usage context.

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