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

Annotations already declare readOnlyHint, idempotentHint, openWorldHint=false and non-destructive, so the safety profile is covered. The description adds genuinely new behavioral context: the returned summaries/headlines/quotes are restated third-party content and must be treated as untrusted data and not as instructions. That prompt-injection warning is the kind of trait annotations cannot express, which lifts this above baseline.

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 purpose is front-loaded in the first sentence, which is good. However, the security caveat runs three sentences and the threat-text sentence ('titles, affected versions and the steps under actions are advice restated from advisories') is verbose and vaguely off-topic for a video-viewing tool, diluting focus.

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 one-parameter, no-output-schema tool whose annotations cover safety, the description supplies the purpose plus the important untrusted-content caveat, which is enough to call it correctly. The main gap is the absence of any when-to-use framing relative to its many siblings.

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% and the single date parameter is fully documented in the schema, including format and the omit-for-latest behavior. The description adds no syntax or interpretation beyond that, which is the expected baseline when the schema does the heavy lifting.

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 states the specific resource: videos judged worth watching from their transcripts, with why/what/who framing. That is clear enough to distinguish it as a viewing-recommendation retrieval tool, but it never contrasts itself with siblings such as magpie_today or magpie_editions, so an agent must infer the split from names alone.

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 when-to-use guidance, no prerequisites, and no named alternative. The description tells what the results contain but never says in which situation an agent should select this tool over magpie_today, magpie_editions, or magpie_search.

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