jio_verify_otp

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

With no annotations provided, the description carries the full burden. It discloses key behavioral traits: it establishes a session, uses a passphrase from an environment variable (so the agent knows not to pass it as a parameter), and implies a multi-step process. It does not cover failure modes, but it provides meaningful context beyond the schema.

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 sentence that is concise and front-loaded. Every word adds value, specifying the action, the session establishment, and the environment variable dependency without unnecessary verbosity.

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 the tool's simplicity (one param, no output schema, no annotations), the description is mostly complete. It outlines the tool's role in the authentication flow, though it could improve by explicitly mentioning the prerequisite that an OTP must have been sent beforehand. Overall, it is adequate for an agent to invoke it correctly.

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% with the 'otp' parameter already described as 'OTP received on mobile.' The tool description adds no new parameter-specific details beyond confirming the OTP is verified. Baseline 3 applies because the schema already handles parameter semantics.

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 purpose: 'Verify OTP and establish a session, then unlock with passphrase from env.' It uses specific verbs and resources, distinguishing it from siblings like send_otp, login, and unlock_passphrase by describing the full sequence it performs.

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 implies the tool is used after receiving an OTP and that it handles both session establishment and passphrase unlocking, but it does not explicitly state when to use this tool versus alternatives like 'login' or 'unlock_passphrase'. There is no explicit when-not or alternative naming.

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