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

With no annotations, the description carries the full burden. It discloses expected runtime (~60s) and methodology (evaluates alternatives, connects sources, reasons through uncertainty), which is useful. However, it does not mention whether the tool is read-only, whether it has side effects, or what the return format looks like. The behavior is partially transparent but lacks critical details.

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 appropriately concise: two sentences plus a runtime note. It front-loads the purpose and lists use cases, with the runtime as a separate line. No extra fluff, and the structure is clear.

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 tool with a single required parameter and no annotations, the description should explain what the query should contain and what the output will be (especially since an output schema exists but is not provided). It also lacks any prerequisites or limitations. The description is insufficient for an agent to correctly invoke the tool without additional information.

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 description says nothing about the 'payload' or 'query' parameters. The schema itself has no parameter descriptions (0% coverage), so the agent receives no guidance on what to put in the query field. This is a critical gap, as the description fails to compensate for the missing schema information.

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 that this is a high-effort reasoning agent for complex tasks requiring deep analysis, and specifies typical use cases like planning, architecture design, and analytical tasks. It differentiates implicitly through the 'high-effort' label and runtime, but does not explicitly contrast with the low and medium variants, so it falls short of a 5.

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 provides clear context on when to use it ('suited for challenging planning, architecture design, and analytical tasks where accuracy and depth are critical'), but does not explicitly state when NOT to use it or mention alternatives like reasoningdelegationlow or reasoningdelegationmedium. The guidance is present but not exhaustive.

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