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

Annotations already declare readOnlyHint=true, destructiveHint=false and openWorldHint=true, so the safety profile is covered. The description adds the returned field set and the endpoint (GET /users), plus the nested-id hint, but says nothing about auth requirements, rate limits, or pagination behavior beyond what the schema covers.

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?

Three short, front-loaded sentences with no filler; the return fields come first and the consumption tip second. The trailing 'GET /users' is mildly redundant but does confirm the read endpoint.

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 simple read-only list tool with no output schema, the description compensates by naming the returned fields and explaining the nested user.id, which is exactly the information an agent needs to use results downstream. Only auth/pagination nuance is missing.

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% and both parameters (page, per_page) are fully documented in the schema, including the chaining instruction to pass next_page. The description adds no parameter detail, 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 users of the Beacon account) and even enumerates the returned fields (id, role, name, email), which goes beyond the title. It does not explicitly distinguish itself from the record-oriented siblings, though the 'users' resource is self-evidently distinct from records.

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?

Usage is implied rather than stated: the note 'Use the inner user.id for link to a user fields' tells the agent how to consume the result, but there is no explicit when-to-use or when-not-to-use guidance relative to the record tools. Adequate but leaves selection reasoning to inference.

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