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

Annotations already declare readOnlyHint=false, destructiveHint=true and openWorldHint=true, so the write/irreversibility profile is known. The description adds a genuine non-obvious trait — the URL is fetched once and never persisted — but does not say what the confirmation actually creates, whether it is idempotent, or what happens on failure.

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?

Two sentences with no filler, and the core action is front-loaded ahead of the input requirement. Very tight, though the second sentence packs two ideas (URL identity and fetch-once/no-persist) that could be marginally clearer when split.

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 destructive, open-world mutation with no output schema, the description covers the critical input precondition but omits the outcome of confirming (what asset is created), handling of the undocumented draft_id/connection_context parameters, and failure behavior. Adequate but with clear gaps.

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 only 25% (only customer_id is documented), so the description must carry the load. It does clarify source_url semantics — it must match the previously prepared HTTPS URL, or reuse the same gdrive: selection_key — which is valuable, but draft_id and connection_context remain undocumented in both places.

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?

States a specific verb and resource ('Confirm a reviewed video upload draft'), which is clearly distinct from the sibling prepare/status/remove tools. It does not name the prepare tool that must precede it, but the phrase 'reviewed ... draft' strongly implies the two-step prepare/confirm pattern.

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?

The requirement that the exact prepared URL or the same gdrive: selection_key be resupplied implies this runs only after a successful prepare step, so usage is inferable. However, there is no explicit when-to-use statement, no mention of the prepare sibling, and no guidance on error or retry paths.

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