browser_record_stop

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

Annotations already declare destructiveHint=true, readOnlyHint=false, openWorldHint=true, and idempotentHint=false, so the safety profile is covered. The description adds useful behavior beyond annotations by stating the output is an mp4 via ffmpeg and that it returns a file path, but it does not explain how the destructive discard option affects saved output.

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?

The description is a single, front-loaded sentence that states the action, output format, and return value without filler. Every clause contributes to understanding the tool.

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 destructive mutation tool with two completely undocumented parameters and no output schema, the description is too sparse. It covers stop/save/return format, but omits any explanation of discard or trimStart, leaving significant gaps for correct invocation.

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%, and the description does not mention either parameter. It provides no meaning for 'discard' or 'trimStart', so an agent cannot infer how these options alter the stop/save behavior from the description 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 states a specific verb ('Stop') and resource ('the recording'), and specifies the save behavior and output format. It distinguishes itself from browser_record_start by describing the stop/save action rather than starting a recording.

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 phrase 'Stop the recording and save the clip' implies this should be used after a recording has been started, which is clear context. However, it does not name alternatives such as browser_record_start or record_clip, nor does it say when not to use it.

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