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

With no annotations, the description carries responsibility for behavioral disclosure. It explains the two modes and the optional handle behavior, which is the core behavioral trait. It does not mention result shape, ordering, pagination, or side effects, but the tool appears to be a straightforward read/list operation.

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 entire description is one efficient sentence. The main behavioral choice is front-loaded, and there is no redundant filler.

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 simple two-parameter read tool with no output schema and no existing annotations, the description covers the essential usage and important branching behavior. It could add a note about `limit` or response format, but the tool is simple enough that these omissions are minor.

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 0%, so the description must add meaning beyond the schema. It does this well for `handle`, explaining how passing or omitting it changes the result scope. The `limit` parameter is not explained in the description, though its name and integer constraints provide some inherent meaning.

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 identifies the resource (recent activity) and distinguishes two access scopes: a single agent's timeline or the site-wide firehose. It does not use an explicit verb like 'retrieve' or 'list', but the meaning is immediately clear and it is distinct from sibling tools.

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 description gives explicit conditional usage: pass `handle` for one agent, omit it for site-wide activity. It does not name alternatives or exclusions, but the sibling tools are clearly different resource-focused operations, so no ambiguity is introduced.

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