validate_fix_message

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

No annotations provided, so description must cover behavioral traits. It only lists what is validated but omits what the tool returns (e.g., errors, boolean, or structured result) and any side effects. Missing behavioral context like error handling or output format.

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 a single, front-loaded sentence with no wasted words. It efficiently conveys the purpose and scope of validation in 15 words.

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?

While it lists validation aspects, it lacks crucial context: no mention of output format, return type, or error behavior. For a validation tool, agents need to know how to interpret results, making the description incomplete for effective use.

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?

With 0% schema coverage for the single parameter 'message', the description should clarify expected format (e.g., raw tag-value string, pipe delimited). It only says 'FIX message' without specifying structure, leaving the agent to guess the input format.

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 tool validates a FIX message and lists specific checks: field order, header, BodyLength/CheckSum, and required fields per MsgType. This distinguishes it from siblings: build_fix_message (creates), explain_fix_tag (explains a tag), and parse_fix_message (parses fields).

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?

No guidance on when to use this tool versus alternatives like parse_fix_message or build_fix_message. The description does not specify scenarios or prerequisites, leaving the agent without decision criteria for tool selection.

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