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

Annotations already state readOnlyHint=true, idempotentHint=true, and destructiveHint=false. The description adds the explicit 'leitura' (read) confirmation and discloses additional behaviors: the three supported actions and bulk support via 'ids'. This goes beyond what annotations provide and does not contradict them.

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 extremely concise, using a structured format with parentheses to denote parameter usage. It conveys the core functionality, actions, and bulk support in two sentences with no filler, making it easy to scan.

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 multi-action tool with no output schema, the description covers the essential actions and bulk behavior, but it omits clarification of the 'account' parameter and does not describe the result of each action. Given the tool's complexity, more context could be provided, though annotations mitigate the safety aspects.

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?

The schema has 0% description coverage, so the description must compensate. It explains the purpose of 'cursor' (for list), 'id' (for get/activities), and 'ids' (for batched execution). However, the 'account' parameter is not mentioned, leaving a gap in fully understanding the tool's input semantics.

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 clearly states the tool handles Guru account users/members with read-only access, and enumerates the actions: list (with cursor), get (with id), and activities (with id). This is specific and distinguishes from a generic resource tool, though it does not explicitly contrast with sibling tools like guru_users_get or guru_users_list, which slightly reduces clarity.

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?

No guidance is given on when to use this tool versus alternatives. It does not mention that this tool aggregates multiple actions or when it would be preferred over the separate guru_users_get and guru_users_list tools. The description only lists capabilities without contextual recommendations.

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