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

With no annotations, the description carries the full burden and does disclose meaningful behavior: the server default excluding verification_strategy=manual via autoVerificationOnly, branch aggregation/dedup semantics, and rollup filtering by platform. It omits permissions or pagination behavior, but the defaults and aggregation rules are genuinely useful non-obvious context.

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?

Front-loaded with the purpose then dense parameter/behavior detail in a single efficient paragraph; nearly every clause carries information. It is a touch run-on but not padded or repetitive.

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 13-param, nested-object tool with no output schema, it covers scope, branch semantics, defaults, and hints at the response shape (rankedScenarios for gaps). Remaining gaps are the undocumented params and the absence of return/output detail, but the description is substantially complete.

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 0%, so the description must compensate and does so for many of the 13 params: scope.filePaths/folderPath, branchName, platform, scenarioLifecycleStatuses, considerScenarioPriority, considerSemanticCoverage, limit, and autoVerificationOnly. It leaves release, environment, recordTypes, and the two includeNonCovered* flags undocumented, so it does not fully close the gap.

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+resource: 'Fetch requirement (scenario) coverage,' with a clear scope qualifier (platform-rooted tests/plans folder). An agent can tell it retrieves coverage data rather than scenarios or events. It does not name any sibling for differentiation, so it falls short of a 5.

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 real conditional guidance: 'Omit branchName for cross-branch coverage' vs 'Pass branchName only when results must be limited to one Git branch,' plus a prescribed recipe for top-N gap recommendations. It never names an alternative sibling tool, so it is strong context without explicit when-not/alternatives.

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