flutter_core_did_send_first_frame_event

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

With no annotations provided, the description carries the full burden of behavioral disclosure. It states the tool checks an event status but doesn't explain what 'first frame event' means in Flutter context, whether this is a read-only operation, potential side effects, or how results are returned (e.g., boolean, status message). For a tool with zero annotation coverage, this leaves significant gaps in understanding its behavior.

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 a single, clear sentence: 'RPC: Check if the first frame event has been sent'. It front-loads the purpose efficiently without any wasted words, making it easy to parse and understand quickly.

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 (a debugging/monitoring RPC call), lack of annotations, and no output schema, the description is incomplete. It doesn't explain what the check entails, what the return value indicates, or how it fits into Flutter app debugging. For a tool with no structured behavioral or output information, more context is needed to be fully helpful.

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?

The input schema has 100% description coverage, with the 'port' parameter fully documented in the schema itself. The description adds no additional parameter information beyond what the schema provides, such as default behavior or usage examples. With high schema coverage, a baseline score of 3 is appropriate as the schema does the heavy lifting.

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 as 'Check if the first frame event has been sent', which is a specific verb ('Check') and resource ('first frame event'). It distinguishes itself from siblings like 'flutter_core_did_send_first_frame_rasterized_event' by focusing on the initial frame event rather than rasterization. However, it doesn't explicitly differentiate from other debugging or monitoring tools in the sibling list, keeping it from a perfect score.

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 no guidance on when to use this tool versus alternatives. It doesn't mention prerequisites (e.g., needing a running Flutter app), exclusions, or related tools like 'flutter_core_did_send_first_frame_rasterized_event' for similar checks. This lack of context makes it unclear when this specific check is appropriate.

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