Fetch Library Changelog

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

Annotations already declare readOnlyHint, idempotentHint, and destructiveHint=false. The description adds value by detailing the fallback order (GitHub Releases -> CHANGELOG.md -> docs site), which is useful behavioral context. However, it does not mention potential gaps (e.g., if all sources fail).

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?

Three sentences: purpose+method, usage, sibling differentiation. No extraneous information, every sentence 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?

The description is complete for a read-only tool with clear usage and sibling differentiation. It lacks explicit mention of output format (likely plain text/markdown) but the tokens parameter implies content. Annotations cover safety. Minor gap but overall solid.

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?

Input schema has 100% description coverage for all three parameters. The description does not add significant new meaning beyond the schema; it merely repeats examples already present. Baseline 3 is appropriate.

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 explicitly states the tool fetches release notes and changelog for a library, with a clear verb ('Fetch') and resource ('library'). It distinguishes itself from the sibling tool gt_migration by specifying its scope (changelog vs. migration steps).

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?

Provides explicit guidance: 'Use before upgrading' and 'Use this for "what changed in version X" questions.' It explicitly tells when NOT to use it and directs to gt_migration for migration-related queries.

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