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

Annotations already declare readOnly, idempotent and closed-world, so the safety profile is covered. The description adds valuable content signal that annotations cannot: the response includes full notes, breaking changes and deprecations, which is the main reason an agent would pick this tool.

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?

A single sentence that front-loads the action and identifier forms, then lists the returned content. No filler and nothing that repeats structured fields verbatim.

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?

With no output schema, the description responsibly summarizes what is returned (notes, breaking changes, deprecations), which is enough to call the tool correctly. It omits failure behavior (not-found / ambiguous slug) and whether changelog must be resolved first, though the schema's parameter description covers the latter.

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 coverage is 100%, so baseline is 3, but the description adds a detail the schema lacks: the version may carry a 'v' prefix (v2.0.0). That is a concrete, non-redundant clarification of the 'release' argument.

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?

States a specific verb and resource ('Get one release') plus the two accepted identifiers (version or URL slug), which cleanly separates it from list_releases. It never names a sibling explicitly, so the differentiation is implied rather than stated.

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 word 'one' implies single-record lookup versus enumeration, but there is no explicit statement of when to prefer this over list_releases or get_changelog, and no mention of behavior when the release is not found. Usage is inferable but not guided.

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