flipper-mcp

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flipper_gpio

Control Flipper Zero GPIO pins directly: set mode, write 0/1 values, or read pin states using specific pin identifiers like PC0, PA7.

Instructions

Control a GPIO pin. action: mode|set|read. pin: e.g. PC0, PC1, PC3, PB2, PB3, PA4, PA6, PA7. For mode/set, value 0/1.

Tool call template

Replace each placeholder with a value matching the input schema. Only required parameters are included; add optional parameters as needed.

{
  "id": 1,
  "jsonrpc": "2.0",
  "method": "tools/call",
  "params": {
    "arguments": {
      "action": "<action>",
      "pin": "<pin>"
    },
    "name": "flipper_gpio"
  }
}

Input Schema

Name	Required	Description	Default
`pin`	Yes
`value`	No
`action`	Yes

Output Schema

Name	Required	Description	Default
`result`	Yes

Schema Changelog

Changes observed during successful MCP inspections.

First observedv0.1.0Aug 2, 2026

TDQS

A3.6/5.0

Behavior2/5

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

No annotations are provided, so the description carries the full burden of behavioral disclosure. It only lists action names and pin examples without explaining what each action does (e.g., whether mode sets direction, what read returns) or any side effects/risks of toggling pins. This is a significant gap for a hardware control tool.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely compact, with all sentences contributing useful information. There is no fluff, and the most critical information (action types, pin examples, value range) is front-loaded.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

Despite an output schema existing, the tool is complex enough (hardware interaction) that the description should explain the semantics of each action and any prerequisites or side effects. The current description leaves the 'mode' action undefined, making it incomplete for safe autonomous invocation.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The description adds meaning beyond the bare schema by specifying valid action values and giving concrete pin examples, as well as indicating that value is 0/1 for mode/set. However, it doesn't clarify the exact meaning of 'mode' or what value should be for 'read', leaving some ambiguity.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose5/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses the specific verb 'Control' with the resource 'GPIO pin' and enumerates the valid actions (mode, set, read) along with concrete pin examples. This clearly distinguishes the tool from all sibling tools, none of which handle GPIO.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines4/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No explicit alternatives are mentioned, but among the sibling list no other tool targets GPIO, so the usage context is implicitly clear. The description provides operational guidance by listing valid action values and clarifying that value 0/1 applies to mode/set, which helps the agent know when to supply that parameter.

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