Flutter Inspector MCP Server

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

No annotations are provided, so the description carries the full burden. It discloses that this is an RPC call and specifies the default port behavior, which is useful. However, it doesn't mention potential side effects (e.g., whether this affects app state), performance implications, error conditions, or what the dumped output looks like. For a debugging tool with no annotations, this leaves gaps in behavioral understanding.

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 two concise sentences with zero waste: the first states the action and RPC method, the second provides the default port context. It's front-loaded with the core purpose and efficiently structured.

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 complexity (debugging RPC call), no annotations, and no output schema, the description is moderately complete. It covers the purpose and port usage but lacks details on output format, error handling, or dependencies. For a tool that likely returns structured debugging data, more context would be helpful, though the absence of an output schema isn't compensated here.

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%, with the single parameter 'port' fully documented in the schema. The description adds minimal value by reiterating the default port (8181) and that it's optional, but doesn't provide additional semantics beyond what the schema already states. Baseline 3 is appropriate when schema coverage is high.

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's purpose: 'Dump the semantics tree' with the specific RPC method 'ext.flutter.debugDumpSemanticsTreeInTraversalOrder'. It distinguishes from siblings like 'debug_dump_focus_tree' and 'debug_dump_render_tree' by specifying semantics tree. However, it doesn't explicitly contrast with 'debug_dump_semantics_tree_inverse', which appears to be a related sibling.

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: 'Connects to the default Flutter debug port (8181) unless specified otherwise', indicating when to use the optional port parameter. It doesn't explicitly state when not to use this tool or name alternatives, but the context implies it's for debugging Flutter semantics trees, which is sufficient for most cases.

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