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

Annotations already indicate read-only, idempotent, and non-destructive behavior. The description adds valuable context: it reveals the heuristic (keyword matching on release bodies) and scope (Canton-specific), which are beyond what annotations provide. This gives the agent a clear understanding of the tool's behavior.

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 concise—two sentences—with no wasted words. The first sentence states the primary purpose, and the second provides the heuristic and scope, making it easy to parse quickly.

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?

Given the tool's simplicity (one optional parameter, no output schema, no nested objects), the description covers the essential context: purpose, heuristic, and scope. It lacks detail on the response format, but this is acceptable for a lightweight tool. Minor improvement would be to note that results are filtered release notes.

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% for the single parameter 'limit', with a full description in the schema. The tool description does not add any additional meaning or usage guidance for the parameter, landing at the baseline score.

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 clearly states the tool's purpose: to surface release notes containing security or CVE fixes. It specifies the scope (Canton-specific) and the heuristic mechanism (keyword matching), effectively distinguishing it from siblings like search_release_notes or get_latest_release.

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 implies usage for finding security patches but does not explicitly state when to use this tool versus alternatives such as search_release_notes. No exclusions or alternative tool mentions are provided, leaving the agent to infer context.

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