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

Annotations only supply destructiveHint=true; the description adds genuinely useful behavior the agent could not otherwise know, namely the account-level permission requirement and the 403 failure mode. It also clarifies that ticket setup is out of scope for this call. It omits whether the call is idempotent or what happens on partial success, which keeps it from a 5.

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?

Three tight sentences, front-loaded with what gets created, followed by the follow-on step and the permission caveat. No filler and nothing buried.

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 an 8-parameter tool with nested oneOf locations and enums, the schema and description together cover inputs well and the permission requirement is surfaced. With no output schema, the description never hints at what a successful call returns (e.g. an event id needed for subsequent calls), which is the only meaningful gap.

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 every parameter, enum and nested variant (online/address/custom/toBeAnnounced) is already documented in the schema. The description recaps the field list (name, description, timezone, dates, location, keywords, classification) but adds no syntax or constraint detail beyond it, so baseline 3 applies.

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 specific verb+resource ("Create a base event") and enumerates the core payload fields, distinguishing it from update_event and get_event among siblings. The "base event" framing plus the note that ticket types come later makes the boundary of this tool unambiguous.

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?

Gives clear preconditions (special permission must be activated, else 403) and a boundary rule: ticket types are configured afterward in the Humanitix console, not through this tool. It does not explicitly say when to prefer humanitix_update_event for changing an existing event, so it stops short of full alternative routing.

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