chrome_downloads

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

Annotations already declare readOnlyHint=true, idempotentHint=true, openWorldHint=true, and destructiveHint=false, so safety and repeatability are covered structurally. The description adds little behavioral context beyond enumerating return fields; it says nothing about ordering, truncation at the default limit, or whether the list is scoped to the active browser profile.

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?

A single, front-loaded sentence with zero filler; the resource leads and the fields follow. It is perhaps too terse to earn a 5 relative to the gaps above, but there is no wasted wording.

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?

With no output schema, the parenthetical field list is genuinely useful for anticipating the response shape, which partially compensates. However, an agent still cannot tell ordering, default result count, or whether 'since' is required for meaningful output, so the definition is only minimally complete.

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 50%: 'since' is documented in the schema as an ISO time filter, but 'limit' has no description at all in either place. With low coverage, the description should compensate, yet it never mentions pagination, the default of 10, or ordering of the returned items.

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 resource ('Recent Chrome downloads') and enumerates the returned fields (file path, state, size, source URL, referrer), so an agent knows exactly what data this yields. It is not a verb+resource phrasing, but the retrieval intent is unambiguous and the tool is clearly distinct from browser_* and file_* siblings.

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 statement of when to use this tool versus alternatives, no prerequisites, and no exclusions. The word 'Recent' implies a recency filter but the agent is not told how recency interacts with the 'since' parameter or when to prefer this over chrome_status, chrome_snapshot, or resource_status.

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