Metro Logs MCP

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

No annotations are provided, so the description carries full burden. It discloses that URLs open in 'default handler or Safari', which adds useful behavioral context beyond basic functionality. However, it doesn't cover potential errors, permissions, or simulator state requirements, leaving gaps for a mutation-like tool.

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, efficient sentence that front-loads the core purpose ('Open a URL in the iOS simulator') and adds clarifying detail ('opens in default handler or Safari') without waste. Every word earns its place.

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 tool with 2 parameters, 100% schema coverage, and no output schema, the description is adequate but minimal. It covers the basic action and some behavioral context, but lacks details on return values, error conditions, or integration with sibling tools, making it functional but not fully comprehensive.

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 both parameters thoroughly. The description doesn't add any parameter-specific details beyond what's in the schema (e.g., URL examples or UDID usage), meeting the baseline for high schema coverage.

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 action ('Open a URL') and target ('in the iOS simulator'), specifying the verb and resource. It distinguishes from sibling tools by focusing on URL opening rather than app control or UI interaction, though it doesn't explicitly contrast with specific alternatives like 'ios_launch_app'.

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 implies usage for opening URLs in the iOS simulator, but doesn't provide explicit guidance on when to use this versus alternatives like 'ios_launch_app' for deep links or other URL-handling methods. It mentions 'default handler or Safari' which gives some context but lacks clear when/when-not rules.

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