Derive MCP

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

With no annotations provided, the description carries full burden for behavioral disclosure. It mentions authentication requirement, which is useful, but fails to describe critical aspects: whether this is a read-only or destructive operation, what happens after execution (e.g., trade settlement, position changes), potential rate limits, or error conditions. For a financial transaction tool, this is inadequate.

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 concise at just two short sentences that get straight to the point. Every word serves a purpose with zero wasted information. It's perfectly front-loaded with the core functionality.

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 financial execution tool with no annotations and no output schema, the description is insufficient. It doesn't explain what happens after execution, what the tool returns, error conditions, or how it differs from other trade-related tools. The authentication mention is helpful but doesn't compensate for the missing behavioral context.

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 both parameters thoroughly. The description doesn't add any additional meaning about what 'subaccount_id' or 'quote_id' represent beyond what's in the schema. This meets the baseline for high schema coverage but doesn't provide extra value.

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 action ('execute') and resource ('quoted trade at the quoted price'), making the purpose immediately understandable. However, it doesn't explicitly differentiate from sibling tools like 'place_order' or 'replace_order', which might also involve trade execution, so it doesn't reach the highest score.

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 provides no guidance on when to use this tool versus alternatives like 'place_order' or 'replace_order'. It mentions authentication is required, but this is a basic prerequisite rather than usage context. There's no indication of when this specific execution method is appropriate.

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