Open a Firefox Reverse environment

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

With no annotations, the description should disclose behavioral details. It mentions 'independent profile and independent Firefox process' but does not explain side effects of opening an already-opened environment, required permissions, or what 'open' entails (e.g., launching Firefox).

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 very short but conveys the core purpose. However, it sacrifices necessary detail for brevity. It is not front-loaded with key information beyond the verb.

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?

Given the tool likely involves launching a browser environment, the description lacks completion details like return value, error conditions, prerequisite states, or whether the tool is synchronous or asynchronous.

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 coverage is 0% and the description does not explain the 'id' parameter. The agent has no context on what the ID represents (e.g., environment name, path, or numeric identifier).

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 clearly states the tool opens a specific environment with independent profile and Firefox process, but does not differentiate from sibling tools like frx_env_create or frx_env_current.

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?

No guidance on when to use this tool versus alternatives like frx_env_create or frx_env_close. Does not specify prerequisites or conditions.

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