mcp_authenticate

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

No annotations exist, so the description carries the full burden of behavioral disclosure. It only states the prerequisite actions but does not mention error handling, side effects (e.g., session creation), or what happens on invalid tokens. The description adds no detail beyond the obvious authentication flow, leaving the agent uninformed about failure modes or state changes.

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, direct sentences. The first sentence states the action and key input; the second emphasizes the prerequisite. No superfluous words. Perfectly front-loaded.

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 no output schema and low complexity (2 required string params), the description is mostly sufficient for a simple authentication step. However, it omits what the tool returns on success or failure (e.g., confirmation, session token). The agent might need to infer success from absence of error. A slightly more complete description would mention expected outcome.

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%, so the baseline is 3. The tool description reinforces the source of auth_token (from approval webpage) but does not add substantive meaning beyond what the schema already provides. It is adequate but not exceptional.

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 verb 'Complete' and the resource 'MCP authentication'. It specifies the prerequisite actions (click link, approve, copy code), which distinguishes this tool from mcp_login (initiation) and mcp_logout (termination). The purpose is unmistakable.

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 instructs when to use the tool: after the web approval step. It implies the context relative to mcp_login and mcp_logout. While it does not name alternative tools or explicitly state when not to use it, the guidance is clear enough for an agent to sequence correctly.

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