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

No annotations are provided, so the description carries the full behavioral burden, yet it discloses almost nothing. 'Value discarded' hints that inputs are not persisted, but side effects, permissions, failure modes, and return behavior are all unstated. The richer disclosures ('no disk access', 'discarded after the check') live in the schema descriptions, not here.

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 a single six-word fragment with no waste, but its brevity comes at the cost of meaning rather than through efficient front-loading. It is compact yet uninformative.

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 nine optional, heterogeneous parameters, no annotations, and no output schema, the description is far too thin. An agent cannot determine what the tool accepts, what it returns, or which of the nine inputs matter for a given call.

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 parameter is already documented in the schema, establishing the baseline of 3. However, the description adds no meaning about any of the nine unrelated parameters and even names a concept (SQLite rowid) absent from the schema, which risks confusing rather than clarifying.

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 'SQLite rowid integer band, value discarded' names a resource (SQLite rowid) that does not correspond to any of the nine parameters, which are ref/url/city/feed/host/json/path/zone/query. No clear verb is given, and an agent cannot tell what operation this tool actually performs. It reads as a cryptic fragment rather than a stated purpose.

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 when-to-use guidance, no prerequisites, and no mention of alternatives among the many sibling shape-check tools such as validate-json, file-path-ok, or iana-zones. The agent is left to infer usage entirely from the name.

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