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bvandevliet

Betaflight MCP

by bvandevliet

set_failsafe_throttle_low_delay

Set the duration of low throttle before failsafe triggers immediate disarm instead of landing mode, preventing accidental re-arming after landing.

Instructions

Set failsafe_throttle_low_delay: If throttle has been low for this duration before Stage 2 triggers, the FC immediately disarms instead of activating Landing Mode (the "Just Drop" override). Protects pilots who power off their transmitter after landing without disarming. [UINT16, 0–300, default: 100 (10 s)]

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
valueYesValue for failsafe_throttle_low_delay (UINT16, 0–300)
Behavior3/5

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

The description explains the behavioral consequence (disarm vs Landing Mode) and the pilot protection scenario, but does not disclose whether the setting is persistent, requires reboot, or has any side effects. With no annotations, the description carries the full burden, and it is adequate but not thorough.

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 three focused sentences. It front-loads the tool name and action, explains the effect, gives the purpose, and includes the parameter constraints. Every sentence earns its place without redundancy.

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 single-parameter setter with no output schema, the description adequately covers the parameter, default, effect, and use case. It could mention interaction with other failsafe settings, but given the simplicity, it is reasonably complete.

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 schema is 100% covered (one parameter), and the description adds value by specifying the default value (100, corresponding to 10 seconds) and the range (0–300). This provides context that the schema alone does not convey.

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 the verb 'Set' and the resource 'failsafe_throttle_low_delay', and explains the specific behavioral effect (immediate disarm instead of Landing Mode). It is unambiguous and distinguishes this tool from the many other set_ tools in the sibling list.

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

Usage Guidelines2/5

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

No guidance is provided on when to use this tool versus alternatives (e.g., when to get vs set, or how it compares to other failsafe parameters). The sibling 'get_failsafe_throttle_low_delay' exists, but the description does not mention it or offer usage context.

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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