IT Tools MCP Server

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

Annotations provide readOnlyHint:false (which is accurate for a pure computation), but the description adds minimal behavioral context beyond stating what the tool does. It doesn't mention deterministic output, one-way nature of hashing, or that the same input always produces the same hash. No contradiction with annotations exists.

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 perfectly concise with two sentences: a clear purpose statement followed by a helpful example. Every word earns its place, and the structure is 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 simple hashing tool with one parameter and no output schema, the description provides adequate context about what the tool does. However, it doesn't describe the output format (e.g., hexadecimal string) or mention any limitations (e.g., input size constraints), leaving minor gaps in completeness.

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 100% schema description coverage, the input schema already fully documents the single 'text' parameter. The description adds no additional parameter semantics beyond what's in the schema, maintaining the baseline score of 3 for high schema coverage.

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 specific action ('Generate SHA256 hash') and resource ('input text'), with a concrete example. It distinguishes from sibling tools like hash_md5, hash_sha1, and hash_sha512 by specifying the SHA256 algorithm.

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 implies usage context through the example, but doesn't explicitly state when to use this tool versus alternatives like hash_md5 or hash_sha512. No guidance is provided about performance characteristics, security considerations, or specific use cases for SHA256 versus other hashing algorithms.

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