stop_drive_pc_control

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

Annotations already declare destructiveHint=true and readOnlyHint=false, making the operation look severe; the description usefully reframes it as a control-authority release rather than a physical halt, and adds the critical caveat that mechanical stoppage is not guaranteed. That safety scoping is real value beyond the annotations, though it says nothing about the state left behind or whether the call can be repeated safely (idempotentHint=false is left unexplained).

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?

A single compact clause chain: action first, then the safety disclaimer, with zero filler. It is well front-loaded, though the semicolon-joined caveat could be split so the 'not a safety e-stop' warning is more prominent.

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?

An output schema exists, so return values need not be explained, and the tool is low-complexity with 0 required parameters. What is missing is any statement about which connection/port the stop applies to and what state the drive is left in afterward — the most likely source of agent error for a control-release call.

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% for the two parameters (port, transport); only defaults and an enum for transport are present. The description adds no meaning about what port/transport select or how they interact with a previously selected device, so the agent must infer parameter intent from names alone.

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 uses a specific verb pair and resource: 'stop PC control and release control authority' (停止 PC 控制并释放控制权), so the agent knows exactly which state change is performed. It is clearly distinguishable from siblings like execute_drive_run or reset_drive_fault, though it does not name any sibling explicitly.

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?

Usage is implied by the caveat that this is a software-only command rather than a safety stop, which tells the agent it belongs to a control-session teardown flow. However, it gives no explicit when-to-use / when-not-to-use rule and does not point to any alternative sibling for achieving a mechanical stop.

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