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

Annotations already declare readOnlyHint=true, so the safety profile is covered. The description adds the REST endpoint mapping but says nothing beyond schema about pagination behavior, default ordering, result volume, or auth requirements. With annotations carrying the safety burden, this is adequate but thin.

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, front-loaded sentence naming the resource first, then the optional filters, followed by the endpoint reference. No filler or repetition.

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 read-only list tool with ten fully documented parameters and no output schema, the description covers purpose and filterability adequately. It stops short of explaining pagination/result-size behavior, which is the main remaining gap for an agent planning calls.

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 coverage is 100%, so every parameter (branch, outcome, commitId, durationMin/Max, page/pageSize, service) is already fully documented in the schema. The description's filter list merely summarizes what the schema details, adding no syntax or semantics beyond it. Baseline 3 applies.

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?

Specific verb + resource ('List a repository's test-analytics results') that clearly separates this tool from the coverage-oriented siblings like codecov_get_coverage_report or codecov_list_commits. It even names the underlying REST resource, removing ambiguity about what data comes back.

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 by enumerating supported filters (branch, commit, outcome, duration), which tells the agent what queries are possible. However, it never states when to prefer this tool over sibling listing tools such as codecov_list_commits or codecov_get_commit, and gives no prerequisites or exclusions.

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