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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=false, and destructiveHint=false, so the safety profile is covered structurally. The description adds no behavioral context beyond that — nothing about output format (hex casing/length), determinism, or the meaning of 'client and server side', which is vague rather than informative.

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?

It is a single, front-loaded sentence with the core purpose first, which is good. However, the 'client and server side from freedailypro' fragment is filler that consumes space without adding selection or invocation value.

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?

With no output schema and no annotations describing return values, the description should at least indicate what comes back (a hex digest) and clarify the required input parameter. Neither is provided, leaving the agent to guess at the input/output contract for a simple but under-documented tool.

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 0%, so the description carries the burden. It echoes the algorithm enum values (already fully enumerated in the schema) but says nothing about the required 'text' parameter — what it represents (raw string, encoding expectations) or whether algorithm has a default. It does not compensate for the documentation gap.

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 names a specific verb and resource ('Hash generator') and enumerates the supported algorithms, which clearly separates it from siblings like generate_uuid, generate_password, or base64. The 'client and server side from freedailypro' clause is vendor noise rather than clarification, keeping it short of a 5.

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?

There is no statement of when to use this tool versus alternatives such as base64, generate_uuid, or generate_password, and no mention of constraints or prerequisites. The agent must infer usage purely from the name and algorithm list.

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