insert_clip_envelope_step

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

With no annotations, the description carries the full burden. It discloses a key side effect (creates the envelope if missing) and a failure mode (error on Arrangement clips). It does not mention whether an existing point at the same time gets overwritten, which is a minor gap, but the provided behavior is meaningful.

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 compact and front-loaded: a one-sentence purpose, two behavior notes, and a structured arg list. Every sentence earns its place without fluff or redundancy.

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 7-parameter tool with no annotations and no schema descriptions, this description is complete. It covers purpose, constraints, side effects, and all parameter semantics. The presence of an output schema further reduces the need to describe return values.

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 schema has 0% description coverage, but the description enumerates all 7 parameters with clear meanings: zero-based indices, time in beats, automation value, and curve default. This fully compensates for the schema's lack of descriptions and leaves no ambiguity.

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 opens with a specific verb+resource: 'Insert an automation breakpoint into a clip's parameter envelope.' This clearly distinguishes it from sibling tools like get_clip_envelope or clear_clip_envelope, which read or remove envelope data.

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?

It explicitly states 'Only works for Session clips' and warns 'Arrangement clips will return an error,' providing a clear when-not-to-use condition. It also mentions that the envelope is created if it doesn't exist, implying a valid use case for first-time automation. However, it does not name alternative tools for similar operations.

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