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

Annotations already declare readOnlyHint, idempotentHint, destructiveHint=false and openWorldHint=false, so the safety profile is covered. The description does add one genuinely useful behavioral fact beyond them: it sends nothing and the agent must copy or send the message personally, which prevents a false assumption of delivery. It stops short of describing freshness of the 'latest numbers' or any listing-state prerequisites.

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 compact sentences with zero filler. The payload contents are front-loaded, and the critical 'it sends nothing' caveat follows immediately.

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?

An output schema exists, so return values need no elaboration, and the description still usefully enumerates the payload parts plus the no-send behavior. The only real gap is routing guidance against overlapping link-related 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?

There is a single parameter with 100% schema description coverage pointing to list_listings, so the schema already carries the semantics. The description adds nothing about listingId handling, and the baseline of 3 is appropriate when the schema does the work.

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 concrete bundled resource — live links (website, video), a video download location, and a ready-to-send message draft with latest numbers — so an agent knows exactly what comes back. It does not, however, differentiate itself from adjacent siblings such as get_listing_links or create_seller_report_link, which appear to overlap on link retrieval.

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?

Usage is only implied by the phrase 'everything the agent needs to update the home seller.' There is no explicit statement of when to call this instead of get_listing_links, get_listing_status, or create_seller_report_link, and no when-not guidance or prerequisites.

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