hash_string

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It mentions the tool 'generates a hash' but doesn't specify whether this is deterministic, what algorithm is used, if it's cryptographically secure, or what the output format looks like (e.g., hex, base64). For a hashing tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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 and front-loaded: the core purpose is stated in the first phrase, and the additional context is brief and relevant. Every sentence earns its place without redundancy, making it efficient and easy to parse.

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?

Given the tool's moderate complexity (hashing function), no annotations, no output schema, and 1 parameter with full schema coverage, the description is minimally adequate. It states what the tool does and hints at usage but lacks details on behavior (e.g., algorithm, output format) and doesn't fully compensate for the missing annotations, leaving room for improvement.

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 100% description coverage, with the parameter 'input' documented as 'String to hash'. The description adds no additional parameter semantics beyond this, as it doesn't explain constraints like string length or character set. With high schema coverage, the baseline score of 3 is appropriate, as the schema does the heavy lifting.

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's purpose: 'Generate hash for a string' specifies both the action (generate hash) and the resource (string). It distinguishes from siblings like encode_base64 or generate_password by focusing specifically on hashing. However, it doesn't specify the hashing algorithm or output format, keeping it from a perfect 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 implied usage context with '(useful for .env file keys)', suggesting a specific application scenario. However, it doesn't explicitly state when to use this versus alternatives like generate_password (for security) or encode_base64 (for encoding), nor does it mention any prerequisites or exclusions. The guidance is helpful but incomplete.

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