login

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

No annotations are provided, so the description carries the full burden. It discloses that the first call returns an authorize URL and a ready-to-relay message, and that the second call finishes login with the callbackUrl. It does not describe side effects like token storage or error states, but the core behavior is transparent enough for an agent.

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 tightly written sentences front-load the purpose and then specify the exact two call patterns. Every clause contributes necessary information; there is no filler or repetition.

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?

The description covers both invocation phases and the callback fallback, which is the bulk of what an agent needs to drive this OAuth login flow. It does not mention what the final successful response looks like, but given there is no output schema, a bit more detail there would improve completeness.

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% and the schema already describes callbackUrl. The description adds valuable context by explaining that omitting the parameter starts login and passing it finishes login, reinforcing the two-phase flow beyond the raw 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 purpose: 'Connect Microsoft To Do' and explains the two-phase login flow (start with no arguments, finish with callbackUrl). This distinguishes it from siblings like logout and login_status without ambiguity.

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 explicit when-to-use instructions: call without arguments to initiate login, and call again with the callbackUrl when the user provides it. It does not explicitly mention alternatives or when not to use it, but the two-step flow is clearly specified.

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