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

Annotations already declare a non-readOnly, non-destructive, non-idempotent mutation, so the safety profile is covered. The description adds that the answer reports the ending location and arrival time, which is useful return context, but it does not disclose failure modes, blocking behavior, or interaction with other movement tools.

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?

Three short sentences with the core action front-loaded. The phrasing is informal ('The answer says where the walk ends and when you get there') but not wasteful; it could be slightly more direct.

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, but the description explains what the response contains. Combined with fully documented parameters and annotations covering safety, the definition is largely complete for a simple movement tool. It could still clarify what happens when a destination is unreachable.

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 schema already documents all four parameters in detail, including the key/shadow/idempotency auth mechanisms. The description only indirectly references the 'to' parameter via 'the spot the first look gives', adding little beyond what the schema 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?

States a specific verb ('walk') and target ('a spot on the floor'), and distinguishes the action from the sibling 'look' by explaining how to obtain the destination. However, it does not explicitly differentiate from movement-adjacent siblings like 'sit_down' or 'stand_up'.

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?

Provides clear when-to-use guidance ('To go to a place...') and a concrete prerequisite ('send the spot the first look gives for it'). It does not state when not to use this tool or name alternatives, so it falls 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.