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

With empty annotations, the description carries the full burden of behavioral disclosure. It states the action ('Calculates') and the return type ('a json object'), but does not disclose whether this is a read-only operation, any side effects, rate limits, or authentication requirements beyond the param descriptions. It does mention token and wallet_fk come from /access/login, which is useful, but overall behavioral transparency is minimal.

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 first sentence is repeated verbatim twice, wasting half the description. The @param structure is clear, but the duplication is a significant structural flaw. Overall it is short, but not concise due to redundancy.

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 4 required parameters, no annotations, and no visible output schema, the description is incomplete. The @return says 'a json object' without any detail on success/failure fields or structure. It also lacks context on when to use this over sibling tools. The description is insufficient for an agent to fully understand the tool's behavior and integration.

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 0%, so the description must compensate. It does list all four parameters with brief explanations: api_key is 'allocated to your application', token and wallet_fk are 'provided by /access/login', and amount is 'the transaction amount'. This adds meaning beyond the bare schema names and types, especially indicating the source of token and wallet_fk.

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 function: 'Calculates the transaction fee given an amount.' This is a specific verb+resource combination. However, it does not distinguish itself from the sibling tool 'netfluid__fees', which could be confused with this fee calculation function.

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?

There is no guidance on when to use this tool versus alternatives. It does not mention the sibling 'netfluid__fees' or any context for when to calculate a fee vs. listing fees. The only implied usage is that it calculates a fee for a given amount, but no exclusions or alternative references are provided.

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