jio_login

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

No annotations are present, so the description carries the full burden. It discloses the use of environment credentials, session reuse, and the OTP requirement for first-time logins. While it does not detail every side effect (e.g., whether a new session is saved), it provides substantial behavioral context beyond a simple 'login' statement.

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 highly concise, consisting of three short sentences that front-load the core purpose, then add session behavior and first-time login instructions. Every sentence earns its place without unnecessary detail.

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 (0 params, no output schema), the description covers essential aspects: credentials, session reuse, and OTP workflow. It lacks explicit details about return values or failure behavior, but the provided information is sufficient for an agent to select and invoke the tool correctly in most scenarios.

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?

With zero parameters in the schema, the description compensates by explaining that credentials come from environment variables (Mobile + Passphrase) and that an OTP can be set via JIOAICLOUD_OTP or through OTP tools. This adds meaning beyond the empty input schema, effectively documenting the implicit inputs.

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: 'Log in to JioAICloud using env credentials (Mobile + Passphrase).' It uses a specific verb ('Log in') and resource ('JioAICloud'), and the mention of saved sessions and OTP flow distinguishes it from siblings like jio_logout and jio_auth_status.

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 provides explicit guidance for first-time login: 'send OTP first (jio_send_otp / jio_verify_otp) or set JIOAICLOUD_OTP.' It also mentions using saved sessions when possible, giving context on when the tool may not require OTP. However, it does not explicitly say when to use alternatives like jio_auth_status to check existing login state.

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