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

With no annotations, the description carries the full behavioral burden, and it discloses nothing: no return format, no handling of which characters count as punctuation, no edge-case behavior. A two-word echo of the name leaves the agent with zero behavioral information.

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 short, but the brevity is under-specification rather than conciseness — there is no content to be concise about. Nothing is front-loaded because nothing is said.

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 tool with two optional parameters, no annotations, and no output schema, the definition is completely inadequate; an agent has no basis for deciding input format or interpreting the result.

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 100%, so the two parameters (text, input) are technically documented by the schema, which sets the baseline at 3. The description adds nothing and notably does not resolve the ambiguity between the near-identical 'text' and 'input' parameters, but by the stated rule the schema coverage carries this dimension.

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 is 'Punctuation Count: Punctuation Count', a pure restatement of the tool name with no verb, no resource detail, and no distinguishing information. An agent cannot tell from this text whether it counts punctuation characters, counts punctuation marks by type, or returns a ratio.

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 guidance whatsoever on when to use this tool versus alternatives. Siblings such as x402-strip-punctuation, x402-char-count, and x402-whitespace-count make the selection problem real, and nothing here routes the agent among them.

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