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

With no annotations, the description carries the full burden of behavioral disclosure. It adds one behavioral trait—'input discarded'—which suggests the input is not retained, but it does not say whether the tool mutates anything, what it returns, whether it performs network or disk access, or what failure modes exist. The core behavior is itself unclear.

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 short and free of filler, but it is an under-specified fragment rather than a well-structured definition. Omitting the verb saves words at the cost of clarity, making it closer to a cryptic label than a self-contained tool description.

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 10 optional parameters, no output schema, no annotations, and 31 sibling tools, a five-word description is far from complete. It does not explain the expected output, return type, or which parameter payload the tool actually acts on, so an agent cannot reliably select or invoke it.

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 each of the 10 parameters is individually documented, including notes like 'discarded after the shape check' and 'no disk access'. The main description adds little beyond a blanket 'input discarded' that is already reflected in several schema entries; it also fails to identify which optional parameter is the intended input for a z-base-32 check.

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 a noun fragment ('z-base-32 charset') with no operation verb such as validate, check, encode, or convert, so it restates the topic in the tool name without stating what the tool does. 'Input discarded' describes input handling, not the tool's purpose, and it does not distinguish zbase32-ok from the many sibling *-ok and shape-check tools.

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 on when to use this tool versus a sibling such as browser-url-ok, file-path-ok, wiki-title-ok, or validate-json. No conditions, conditions-not-to-use, or exclusions are given; the z-base-32 phrase only weakly implies a charset-related use case.

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