nhcx_login

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

With no annotations, the description carries the full burden. It discloses the authentication action, token caching, and a 15-minute timeout, which is valuable. However, it does not explain what happens on failure, whether an existing token is overwritten, or any potential side effects beyond caching.

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 exactly two sentences, front-loaded with the core purpose and followed by the use case. Every phrase adds value, with no redundant or filler content.

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 no-parameter tool with no output schema, the description effectively covers purpose, usage guidance, and a key behavioral detail (token lifetime). It could mention the return value or prerequisites, but the note that other tools auto-authenticate makes the overall context sufficient.

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 tool has zero parameters, so the schema provides complete information. Per the rubric, a baseline of 4 is appropriate since there is nothing for the description to add about parameters.

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 clearly states the tool's function: 'Authenticate with the ABDM gateway V3 and cache a session token (15 min).' It uses a specific verb and resource, and distinguishes itself from siblings by noting 'all other tools auto-authenticate', making its purpose unique.

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?

The description explicitly says 'Useful as a connectivity check' and 'all other tools auto-authenticate', providing both a recommendation for when to use it and an implicit exclusion for normal operations. This is clear guidance versus alternative tools.

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