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

Goes well beyond the annotations: it states the call does NOT change the mode, that it returns a confirmation URL, that the wallet's OWNER must approve out-of-band in their own browser (never in-chat), and the polling handshake that follows. This is rich behavioral context that matches idempotentHint=false and adds the human-in-the-loop constraint the annotations cannot express.

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?

Front-loaded with the action, then trigger, then exclusions — a logical routing order. It is dense but each sentence routes the agent, though the second sentence is heavily packed and could be slightly tighter.

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 complex multi-step confirmation workflow with an output schema and annotations already present, the description covers the full lifecycle: trigger, non-effect, out-of-band approval requirement, and polling. Nothing essential to correct invocation is missing.

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 0% across 3 parameters, so the description must carry the load. It implies 'mode' and 'wallet_address' contextually, but never defines valid mode values, formats, or the purpose of caller_id; the only parameter it names concretely (device_code) belongs to the poll tool, not this one.

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 ('Open the browser-confirmation handshake to loosen a Lane 2 wallet's permission mode') and explicitly distinguishes itself from set_permission_mode and request_wallet_policy_loosening. An agent can identify the tool and its scope without opening the schema.

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?

Gives an explicit trigger ('Call this when set_permission_mode refuses with BROWSER_CONFIRMATION_REQUIRED'), names the follow-up tool (poll_permission_mode_change), and states when NOT to use it (invalid mode, non-Lane-2 wallet, or a tightening → call set_permission_mode directly). Both directions and alternatives are covered.

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