hash_sha256

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

Description indicates a pure hashing operation with no side effects, but does not elaborate on behavioral traits beyond what annotations provide. Annotations have readOnlyHint=false, which is consistent with a generation tool, but no additional context (e.g., determinism, input/output constraints).

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?

Single sentence with a concrete example; no extraneous words. Efficiently communicates the tool's purpose.

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 one-input, no-output-schema tool, the description is sufficiently complete. It covers purpose and gives an illustrative example.

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 coverage is 100% for the single parameter; the description adds an example but no additional semantics beyond what the schema already provides ('Text to hash with SHA256'). Baseline 3 is appropriate.

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?

Description clearly states 'Generate SHA256 hash of input text', specifying a specific verb and resource, and it distinguishes itself from sibling tools like hash_md5, hash_sha1, and hash_sha512.

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?

Description provides an example but no explicit guidance on when to use SHA256 versus other hash algorithms (e.g., MD5, SHA1, SHA512). Usage context is implied but not stated.

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