arm_track_envelope

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

The annotations only provide destructiveHint=false, so the description must carry the behavioral burden. It states the high-level arm/disarm effect but does not disclose what arming actually changes, whether an envelope must already exist, how track_index is used, or what errors or side effects may occur.

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 appropriately short and front-loaded, with the action stated first and only a minimal Args block. The omission of track_index is an accuracy problem, but not a conciseness or structure problem; the text is economical.

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?

For a state-changing tool with no output schema and minimal annotations, the description should explain prerequisites and effects more fully. It fails to mention the required track_index, what a valid envelope name looks like, and what happens when the envelope or track is missing.

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 0%, so the description needed to document all parameters, but it omits the required track_index entirely. It adds minor value by explaining arm ('True to arm, False to disarm'), while 'Envelope name' just restates the parameter name.

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 first sentence names a concrete action ('arm or disarm') and a precise resource ('an envelope for recording'), so an agent can tell this is about envelope recording state. It does not explicitly contrast with the similarly named sibling arm_track or with envelope automation functions, but the 'for recording' qualifier provides enough differentiation for a 4.

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?

There is no guidance about when to use this tool versus alternatives such as arm_track, set_track_automation_mode, or get_track_envelope. The only contextual clue is 'for recording,' which is implied rather than stated as a selection rule, and no exclusions or prerequisites are given.

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