Ingest a persona answer video

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

With no annotations, the description carries the full burden, and it does disclose that this is a mutating operation with three distinct side effects: copying the file, writing a history row, and popping a UI element. It does not cover overwrite/idempotency behavior or what happens if the persona does not exist, which is the remaining gap for a write tool.

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?

Three short sentences, front-loaded with the action and its effects before the usage note and the input constraint. The path requirement is slightly redundant with the schema description, a minor bit of waste.

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 no-annotation, no-output-schema mutation tool with 4 params (3 required), the description covers effects, prerequisite, and input format well. The gaps are edge-case behavior (duplicate file, unknown persona) and any hint of what the call returns or throws.

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 100%, so the schema already explains path, title, persona, and transcript_file; the description's only parameter content ('absolute path to a local mp4/mov') restates the path description. It adds no semantics for persona or title beyond what the schema provides — baseline 3.

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 names a specific verb and resource — 'Deliver a finished persona answer video into eve' — and then enumerates the concrete effects (file copy, history row, persona bubble). No sibling tool on the list performs ingestion, so an agent can place it uniquely without inspecting the schema.

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?

'Use after generating a talking-head video for the user' gives a clear triggering condition, and 'Requires an absolute path to a local mp4/mov file' states the precondition. It stops short of naming when-not to use it or what to do if the file is already ingested, so it falls short of a 5.

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