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

The description confirms the operation is read-only and cost-free ('free to read', 'Reads ... never priced') and states that the returned prices are authoritative ('the price you read is the price applied'). However, it contains odd phrases like 'CO 287' and 'Robots are effective-forward' (likely a typo for 'Reprices'), which add confusion rather than clarify behavior. The readOnlyHint annotation already covers the primary trait, and the description adds some but not extensive clarity.

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 extremely verbose and repetitious, using many words to convey simple facts about pricing. It contains awkward phrasing, a run-on structure, and apparent typos (e.g., 'CO 287', 'the same map the metering seam enforces'). This obscures the key information and significantly reduces clarity and readability.

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?

The description attempts to explain the return structure in a loose form (e.g., 'Returns: { title, ... }') and provides pricing policy context. However, it lacks a formal output schema, and the verbose, error-laden text makes it difficult to extract the exact return format. It covers the main points but would benefit from a clearer, more structured explanation.

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 there is nothing for the description to explain. The description mentions 'call federation_pricesheet with arguments {}' which aligns with the empty schema, but it adds no semantic value for parameters. Per the rubric, a high schema coverage (100% here) yields a baseline of 3.

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 tool provides the federation pricesheet, listing per-act Com prices for each platform. It distinguishes itself from sibling tools by focusing on pricing information, and it explicitly notes that it is a read operation ('free to read'). Minor ambiguities like 'CO 287' do not obscure the core purpose.

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 description does not explicitly state when to use this tool versus alternatives. It provides pricing policy details (e.g., 'Any tool not listed is free') but does not guide the agent on when to fetch prices, such as before invoking a paid tool. No comparison with sibling tools is given, so the usage context is only implicitly derived.

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