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

Annotations already declare readOnly, idempotent, non-destructive, and openWorld=false, so the safety profile is covered. The description adds useful scope (Canton repos, bodies rather than titles, indexed corpus) but says nothing about result format, ordering, or pagination.

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 short, front-loaded sentences with no filler; the purpose leads and the use case follows. 'Canton-specific' is a slightly clipped fragment but overall tight and well ordered.

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 single-parameter read-only lookup, the description plus annotations plus a fully documented schema give the agent everything needed to invoke it correctly. No output schema exists, but the return concept (release notes matching a keyword) is clear from context.

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?

Only one parameter, and the schema already documents it at 100% coverage with concrete examples like "logical synchronizer". The description's 'feature/keyword' merely restates the parameter, adding no syntax or matching semantics beyond the schema.

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 (search) and a precise resource (release-notes bodies of all indexed Canton repos), plus scope (Canton-specific). This meaningfully distinguishes it from the many sibling search tools, though it does not name any of them explicitly.

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?

Gives a concrete use case – 'find which release first mentioned X' – which is exactly the question this tool answers. It lacks any when-not guidance or pointer to alternatives such as get_latest_release or get_sdk_changelog, so it falls short of a 5.

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