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

Beyond readOnlyHint=true it discloses scope rules that matter: annual passes do not cross organizations, no site-wide default price exists, operational tickets have no order so myTicket is authoritative, and PENDING does not mean payment failure. These are genuine behavioral facts not present in the annotations. It stops short of describing pagination or the shape/ordering of the returned records.

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?

Every clause carries distinct information and the read-scope statement is front-loaded before the sibling routing. The semicolon-chained style is dense and hard to parse on first read, but there is essentially no 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?

With no output schema, the description must carry the burden of explaining what comes back; it enumerates the entity types returned but not their structure, ordering, or how pagination via limit behaves. For a two-parameter read tool with safety annotations already supplied, this is adequate but leaves a real gap on return shape.

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%, with limit and activityRefs fully documented in the schema itself, so the baseline is 3. The description only restates that activityRefs yields per-activity tickets and adds no format, default, or failure-handling detail beyond the schema.

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 names the concrete entities read: organizationPasses, historical passes/orders, and per-activity tickets for activityRefs. That distinguishes it from collection siblings such as list_my_signups, though the telegraphic Chinese phrasing and the opaque leading token '登录' slow recognition of the core verb.

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 routes the agent explicitly to alternatives: get_payment_order for verifying a PENDING order, create_payment_order for buying/top-up, and list_my_activity_history for activity lists. It lacks a positive 'use this when you want a consolidated pass+order snapshot' framing, but the alternative routing is unusually explicit.

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