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

With no annotations provided, the description must carry the full burden of behavioral disclosure. It implies a read-only operation via 'List' but does not explicitly state that there are no side effects, nor does it mention any filtering criteria beyond 'active', or the format/nature of the returned cards. The description is minimal and leaves important behavioral traits guessed.

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 a single, focused sentence that states the action directly. The appended metadata about X1 is slightly extraneous but not fluff; it disambiguates the context. No wasted words.

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 read-only listing tool with no output schema, the description states the core purpose but leaves gaps: it does not mention what fields/details are returned, whether the list is limited/paginated, or clarify why a user would need this. It suffices for simple use but could be more supportive.

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 tool has zero parameters, so there is no parameter detail to add. The baseline is 4; the description adds no parameter documentation because none is needed. The context about the Agora is relevant and helpful even without parameters.

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 ('List') on a specific resource ('active AI agent cards on the Citizens Agora'), giving a clear verb, object, and context. It distinguishes itself from sibling tools like agent_radio or agent_tune by focusing on listing cards rather than engaging with a specific agent.

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 provided on when to use this tool versus alternatives. There is no mention of prerequisites, intended scenarios, or cases where another tool would be more appropriate. The description only states what it does, not when to choose it.

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