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

Annotations already establish readOnlyHint=true, destructiveHint=false, and closed-world scope, so the safety profile is covered. The description adds useful context about what the cache represents ("what this installation's agents have already read off the official sites") and the meaning of fetched_at vs checked_at, but says nothing about ordering, pagination behavior, or what happens when the role lacks legal-read permission.

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 verb and resource, and the field list is compact and informative rather than padded. The second sentence ("Open where the company lets an agent role read laws") is awkwardly phrased and reads as an afterthought rather than earning its place.

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?

With no output schema, the description appropriately enumerates the returned fields and disambiguates fetched_at from checked_at, which is genuinely needed. Given read-only annotations and fully documented parameters, the remaining gap is only the lack of routing to the sibling search tool.

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%, with limit (max 200, default 50) and filter fully documented in the schema. The description does not supplement those parameters at all, so the 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?

States a specific verb and resource ("List the acts in the legal library") and enumerates the fields returned (url, title, fetched_at, checked_at, length), which makes the content scope unmistakable. It does not, however, distinguish itself from near-siblings like search_legal_library, get_legal_document, or list_legal_references, so an agent must infer the boundary.

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?

There is no statement of when to call this versus search_legal_library or get_legal_document. The trailing clause "Open where the company lets an agent role read laws" gestures at a permissions/environment constraint but is too cryptic to act on, and no exclusions or prerequisites are given.

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