validate_digipin

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 mentions the two checks performed (format and real-location correspondence) but does not state what is returned, how validity is signaled, or whether an invalid DigiPin produces an error or a boolean result.

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, front-loaded sentence with no filler. It states the action and the condition being checked in a compact way, and every word contributes meaning.

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 tool with one parameter, no output schema, and no annotations, the description is insufficiently complete: an agent still does not know what a valid/invalid result looks like, whether it should prefer this over lookup_location_from_digipin, or what the returned data shape is.

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?

The input schema fully documents the single digipin parameter, so the baseline is 3. The description adds some context about format and existence checking, but it does not elaborate on accepted formats, normalization, or error-handling for the parameter beyond what the schema already says.

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 uses the specific verb 'validate' and names the resource (DigiPin) plus the additional existence check against real locations. This makes the tool's purpose clear and distinguishes it from lookup-style siblings like lookup_location_from_digipin, though it does not explicitly call out that distinction.

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?

No guidance is provided about when to use this tool versus alternatives such as lookup_location_from_digipin or coordinates_to_digipin. The intended context is only implied by the word 'validate' rather than explicitly stated.

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