mcp_login

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

No annotations are provided, so the description must fully disclose behavior. It mentions 'manual approval process' and a browser link, but fails to explain login state changes, whether the tool is idempotent, what happens if already logged in, or what credentials are stored. The browser action is noted but not how the returned link is handled.

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?

Extremely concise: two clear sentences and an important note. The purpose is front-loaded in the first sentence, and all three sentences carry distinct, essential information. 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?

No output schema exists, so the description must explain what the tool returns. It implies a link is returned ('click the link provided') but never explicitly confirms the return value (e.g., URL or token), nor does it describe the authentication state outcome, timeouts, or error conditions. The agent lacks critical information to handle the response 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 coverage is 100% with descriptions for both 'email' and 'username'. The description adds value by emphasizing 'REAL' accounts and noting that the email must match a registered account, confirming the need for genuine credentials beyond what the schema alone states.

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 initiates the MCP authentication flow with 'Initiate MCP authentication flow.' However, it does not differentiate from the sibling tool 'mcp_authenticate' (likely a complement step), leaving ambiguity about where one ends and the other begins.

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 clear context: real accounts only ('Provide your REAL JauMemory username and email', 'Test accounts will not work') and a required post-action ('You MUST click the link provided and approve in your browser'). It does not, however, provide explicit when-not-to-use guidance or alternative tools.

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