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

Annotations indicate destructiveHint=true and openWorldHint=true, and the description aligns with these while adding context: it discloses that the concierge works end-to-end, adapts, may sign up/log in, pay within max_budget_usd, and that hard-step failures keep progressing. It also warns that vague goals block and waste planning budget. This goes beyond the annotations to describe the autonomous and potentially side-effecting nature of the operation.

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 longer than typical but each section earns its place: a concise purpose statement, explicit usage routing, and a focused specificity checklist. The structure is front-loaded with the core purpose and then gives actionable guidance. Slightly verbose but well-organized and not redundant.

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?

Given the tool's complexity (autonomous agent with spending, external interactions, and possible irreversible actions), the description covers when to use, how to specify the goal, the async webhook behavior, and budget handling. An output schema exists, so return values are covered. Minor gaps like credential handling are left to sibling tools, but overall it is thorough enough for an agent to call it correctly.

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%, so the schema already documents each parameter. The description adds value by explicitly listing what a specific goal must include (site/place, when, how many, exact URL) and by referencing max_budget_usd as the spending cap. It also clarifies the webhook_url is a best-effort poke and that polling works without it, which aids correct usage.

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 opens with a clear list of action verbs ('book, order, register, resolve, cancel, dispute, file') and explicitly states it is for getting real-world goals done, not analysis or text. It differentiates from the sibling actionlayer_invoke_action by explaining the tradeoff, so an agent can distinguish them without opening schemas.

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?

It explicitly states when to use this tool ('when the user wants something DONE') and when to prefer the sibling actionlayer_invoke_action ('when no typed action covers the job, or when the goal mixes multiple steps'). It also provides concrete pre-call guidance (ask for missing pieces, be specific) and names the exact alternative, leaving no ambiguity.

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