list_visitor_sessions

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

With no annotations, the description must fully disclose behavioral traits. It includes that the tool returns specific data types but omits key behaviors such as pagination handling, default time range, or whether the operation is read-only. The term 'recent' is vague and not further qualified.

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 description is extremely concise, consisting of two focused sentences that convey the core functionality and output without any extraneous words. It is front-loaded with the action and resource.

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?

Given the tool's low complexity and high schema coverage, the description is reasonably complete. It explains what the tool does and what it returns. However, it could improve by clarifying the default 'since' behavior or mentioning pagination, though these are partly covered by the schema.

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%, so the baseline is 3. The description adds context about the overall purpose and return data, but does not elaborate on specific parameters beyond what the schema already provides. It marginally enhances understanding by framing the output.

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 clearly identifies the tool's action ('List recent visitor sessions') and its source ('captured by the tracking pixel'), distinguishing it from sibling list tools by focusing on visitor session data. It also specifies the return contents ('company identification, page views, and engagement data').

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 provides no guidance on when to use this tool versus alternatives. There is no mention of context, prerequisites, or situations where another tool would be more appropriate. For a list tool that coexists with many similar list tools, this is a significant gap.

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