Retrieve registered event definitions from ServiceNow's event registry. Filter by name or description to find specific events for automation and integration.
List registered event definitions in the ServiceNow event registry
| Name | Required | Description | Default |
|---|---|---|---|
| limit | No | Max records to return (default 50) | |
| query | No | Search events by name or description |
Changes observed during successful MCP inspections.
v1.0.2Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?
Annotations already declare readOnlyHint=true and openWorldHint=true, and the description's 'list' action is consistent. No additional behavioral details (e.g., defaults, pagination) are provided, but the annotations cover the safety profile.
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 a single, well-structured sentence that is front-loaded with the verb and resource. Every word adds value, with no unnecessary detail.
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 a simple read-only list tool with two optional parameters and strong annotations, the description is adequate. It does not mention return fields, but that is not required given the simplicity and lack of output 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%, with both parameters (limit and query) described. The tool description adds no extra meaning beyond what the schema already provides, so the baseline score of 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?
The description clearly states the tool lists registered event definitions from the ServiceNow event registry, using a specific verb and resource. It implicitly distinguishes from sibling tools like get_event_registry_entry, register_event, fire_event, and list_event_log.
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 implies usage for browsing/searching event definitions but provides no explicit when-to-use guidance or comparison to alternatives. Similar tools like list_event_log or get_event_registry_entry exist, but no exclusions are mentioned.
Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.