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

Annotations already establish readOnly, idempotent, openWorld, and non-destructive behavior. The description adds valuable context by explaining that the output is a single tool name plus pre-filled arguments and that the recommendation depends on the current state. It aligns with the openWorldHint and does not contradict any annotation.

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 compact and front-loaded: it opens with the actionable question, then outlines the state transitions and output format in two sentences. Every sentence adds value, and there is no redundant or filler content.

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 tool with an output schema, the description is complete. It explains what the tool returns, how it derives recommendations, and when to use it. The presence of an output schema means the description does not need to enumerate return fields.

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 little for the description to add. The schema already states 'No arguments' and that the owner is derived from the authenticated principal; the description reinforces this by showing that state is used instead of arguments. This justifies a strong baseline score.

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's purpose: it returns the single next recommended tool plus pre-filled arguments based on the caller's current state. It distinguishes itself from the listed domain siblings by acting as an orchestration/recommendation tool rather than a direct action, and it explicitly describes the state-to-action mapping. This is specific and unambiguous.

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 phrase 'What should I do next on A2AWire?' and 'so you do not have to reason over the full catalog' make the intended use case clear: use when another agent needs guidance on the next step. It does not explicitly state when not to use it or name alternative tools, but given that siblings are the tools being recommended, the context is sufficient.

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