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

Annotations already declare read-only, idempotent, open-world, non-destructive behavior. The description adds useful behavioral context: the 25-package call limit, the one-call nature, and a clear inventory of what the response contains. No contradiction with the annotations exists.

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 two sentences with no filler. The first sentence front-loads the core behavior and output detail, and the second gives a practical use case. It avoids repeating schema content unnecessarily.

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 4-parameter tool with no output schema, the description plus schema covers the required task_context, input formats, package limits, and response contents sufficiently for correct invocation. It lacks explicit edge-case discussion in the description itself, but the schema covers unparsed formats and package limits, so the definition is reasonably 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 description coverage is 75%, so the baseline is 3. The description only loosely references manifest types and package lists, and does not add substantial meaning beyond what the schema already documents for the other parameters. The mention of package.json/requirements.txt slightly helps for the undocumented manifest_kind parameter, but not enough to push above baseline.

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 states a specific action and resource: producing a health verdict for every package in a manifest or list, with concrete output categories such as deprecated/archived/stale/active/unknown and version/age/advisory details. The 'in one call (≤25 packages)' scope clearly distinguishes it from a single-package sibling like package_health, and the manifest focus differentiates it from runtime_eol.

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 gives explicit use cases: reviewing a repository's package.json or requirements.txt before an upgrade, audit, or fork decision. It does not explicitly name alternatives or state when not to use it, but the bulk-audit framing implies the intended context clearly.

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