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

No annotations are supplied, so the description carries the full burden; it does at least declare "Read-only", which is the single most important trait for a list tool. However, it says nothing about result size, ordering, pagination, or whether agents without Meet are omitted, and there is no output schema to fall back on.

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?

A single short sentence that front-loads the subject (agents with Meet) before the scoping clarification. Nothing is wasted, though the phrasing is slightly terse to the point of being cryptic in the parenthetical.

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 zero-parameter list tool this is close to adequate, but with no annotations and no output schema the agent gets no sense of what an agent record contains or how results are shaped. One added clause about the returned fields would make it 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?

The input schema has zero parameters, so the baseline is 4 and there is nothing for the description to compensate for. No param documentation is expected or missing.

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 resource and filter: agents that have Google Meet connected, and clarifies the parenthetical that this is the calendar's agent filter. An agent can distinguish it from list_agents or crm_list_workspace_agents by the Meet-connection filter, though no sibling is named explicitly. The listing verb is implied rather than stated ("Agents that have...").

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 parenthetical "the calendar's agent filter" implies the usage context (populating a calendar agent picker), which is useful but indirect. There is no explicit statement of when to use this versus list_agents, list_agents_with_stats, or crm_list_workspace_agents, and no exclusion guidance.

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