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

With no annotations, the description carries the full behavioral burden. It discloses the ordering guarantee (oldest first) and the shape of returned rows, which is real added context, but it omits read-only/safety framing, pagination or result-size behavior, and permission needs for a listing operation. Useful but not complete for an unannotated tool.

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 sentences, purpose front-loaded before the return-shape detail, with no filler. Slightly dense in enumerating every event field, but each element serves an agent that has no output schema to consult.

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?

Because there is no output schema, the description must describe returns, and it does so by naming the event fields, the type enum values, and the conditional embedded link rows. It does not explain the amounts/cashFlowMode semantics or pagination, leaving minor gaps for a simple single-parameter list tool.

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?

Only one parameter (dealId) and schema description coverage is 100%, with the schema itself noting it comes from list_venture_deals. The description adds no format, constraint, or example beyond that, so the baseline 3 for schema-carried semantics is appropriate.

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?

Specific verb (List) plus resource (venture events) scoped to a venture deal, with ordering disclosed up front. It names the follow-up siblings (get/update/delete_venture_event), so an agent can distinguish this listing tool from the mutation tools that share the same entity.

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?

It explicitly routes the agent to the correct follow-up tools ('Use the returned event ids with get_venture_event, update_venture_event, and delete_venture_event'), which is genuine workflow guidance. It stops short of saying when NOT to use this tool or pointing to list_venture_deals to obtain the dealId, so a 5 is not warranted.

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