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

Annotations already declare readOnlyHint=true and destructiveHint=false, so safety is covered. The description adds value beyond that by disclosing the sort order ('newest first') and the breadth of the feed ('and more' event types), neither of which is derivable from the schema or annotations.

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 tight sentences, with the resource and ordering front-loaded ahead of filter guidance. The second sentence largely restates schema-documented parameters, so it earns slightly less than full marks, but nothing is bloated.

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 and annotations are present, so return values and safety need not be re-explained. However, the description omits pagination behavior — a limit of 100 with a default of 25 implies more events exist, yet there's no mention of how to page past the cap, which is a real gap for an activity feed.

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 coverage is 100%, so the schema already documents type, limit, and since including ranges and format; baseline 3 applies. The description's example event list is marginal added value and even introduces a naming mismatch ('entered_stage' vs schema's 'stage_changed'), which could confuse the agent about valid values.

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?

States a concrete resource and ordering: 'Workspace event feed, newest first', followed by an enumeration of the event types returned. This is clearly distinguishable from the list_* siblings (list_contacts, list_appointments, list_hooks), though it never explicitly names an alternative.

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 explains what the two filters do ('Use type to filter to one event type and since to filter by timestamp'), which implies when to apply them, but gives no guidance on when to call this versus get_contact or list_contacts, nor any exclusion or prerequisite.

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