chrome-devtools-mcp-mux

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

Annotations indicate readOnlyHint=false, suggesting a write/mutation operation, which aligns with the description's 'Go to' action implying navigation changes. The description adds minimal behavioral context beyond annotations, such as the default project URL behavior, but doesn't detail side effects like page loading, error handling, or performance impacts. No contradiction with annotations exists.

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 extremely concise with two short sentences that are front-loaded with the core purpose. Every word earns its place, avoiding redundancy and clearly communicating the tool's function without waste.

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's moderate complexity (6 parameters, no output schema) and rich schema coverage, the description is reasonably complete. It covers the main purpose and default behavior, but could benefit from more detail on navigation outcomes or error cases. With annotations providing safety context, it's adequate though not exhaustive.

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 fully documents all 6 parameters. The description adds no parameter-specific information beyond implying the 'url' parameter is optional with a default. This meets the baseline of 3 since the schema handles the heavy lifting, but the description doesn't enhance parameter understanding.

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 specific action ('Go to a URL, or back, forward, or reload') and distinguishes this navigation tool from siblings like click, hover, or type_text by focusing on browser navigation rather than page interaction. It also mentions the default behavior ('Use project URL if not specified otherwise'), which adds specificity.

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 description provides clear context for when to use this tool ('Go to a URL, or back, forward, or reload') and hints at alternatives by implying it's for navigation versus other page actions in the sibling list. However, it lacks explicit exclusions or named alternatives (e.g., no mention of when not to use it or direct comparison to tools like new_page).

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