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

With no annotations, the description carries the full burden; it does disclose the human-in-the-loop prerequisite (a browser MSA flow must have finished), which is genuinely useful context. It does not say whether the call is read-only, whether it depends on cookies/browser state from that session, what happens when the operator has not finished, or whether it waits/polls.

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?

One sentence, front-loaded with the precondition and then the action — no waste. The trailing '(checkPermissions)' is internal jargon that adds little for an agent but is not harmful.

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 tool has a trivial schema and no output schema, so the description should say what a successful verification yields (session valid/invalid, what the agent should do on failure). It states the trigger condition but leaves the outcome side unspecified.

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?

The single parameter has 100% schema description coverage, so the schema already explains 'notification_message' fully; the description adds nothing about it, which matches the baseline 3 for high coverage.

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?

States a specific verb and resource ('verify Developer portal session') plus the mechanism used ('checkPermissions'), which is far better than the bare name 'login' that implies credential submission. It does not differentiate from the sibling 'session_status', which an agent could easily confuse with this tool.

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?

'After operator completes Apple IDMSA in a browser' gives a clear ordering precondition that routes the agent to call this only after browser-based auth. There is no explicit exclusion or named alternative (e.g. 'use session_status for a pure read'), so it stops short of a 5.

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