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bvandevliet

Betaflight MCP

by bvandevliet

get_s_yaw

Read the yaw S-term value from Betaflight. This tool returns the unsigned 8-bit integer for yaw stabilization when USE_WING is enabled.

Instructions

Get s_yaw: S-term for yaw. (Requires: USE_WING) [UINT8, default: 0]

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

No annotations are provided, so the description carries the burden. It indicates a read operation ('Get') and notes the type (UINT8) and default value (0), but does not disclose any side effects or permissions. The info adds some value but is minimal.

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 concise: one sentence with the purpose, followed by a prerequisite and type/default info. Every part is meaningful and front-loaded.

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

Completeness4/5

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

For a simple getter with no parameters and many siblings, the description is sufficient: it identifies the resource, states a requirement, and gives the type and default. It lacks explicit mention of return behavior, but the name implies it.

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

Parameters4/5

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

The tool has zero parameters, and schema coverage is 100%. The description adds value by stating the return type and default, which is beyond the empty schema, though not directly about parameters. Baseline for 0 parameters is 4.

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 clearly states 'Get s_yaw: S-term for yaw.' It identifies the specific resource (S-term for yaw) and uses the verb 'Get', distinguishing it from siblings like get_s_pitch and get_s_roll.

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

Usage Guidelines3/5

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

The description mentions a prerequisite ('Requires: USE_WING'), giving context for when the tool is applicable, but does not specify when to avoid it or compare to alternatives among the many sibling tools.

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

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