update_auth

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

With no annotations, the description carries the transparency burden. It discloses key behavior: values are saved to local database and auto-restored next session. However, it does not mention potential side effects (e.g., overwriting existing credentials), validation, or whether changes take immediate effect for API calls.

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?

Two concise sentences. The main purpose is front-loaded, and every sentence adds valuable context: what it does, persistence behavior, and how to get parameter values. No wasted words.

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 3-parameter update tool without annotations or output schema, the description is fairly complete. It explains persistence and data source, but omits return value or success/failure behavior, which could be important for the agent's next steps. Still, the core functionality is well covered.

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 coverage is 100% with each parameter described. The description adds extra context by explaining where to find token and session_id (browser DevTools → Network tab), which is useful beyond the schema. api_url receives no additional description but is already clear in the schema.

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: 'Update authentication credentials' — a specific verb and resource. It distinguishes itself from siblings by focusing on auth, though it doesn't explicitly compare to alternatives, so it lacks some differentiation.

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 gives no guidance on when to use this tool versus alternatives. It only explains how to obtain token and session_id values, but no usage scenarios or exclusions are provided. The intended context is implied but not explicitly stated.

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