Cortex

Getcustomeventforentitybyuuid

getCustomEventForEntityByUuid

Retrieve a specific custom event by its UUID. Returns event details including title, description, timestamp, type, and any custom data associated with the event.

Input Schema

TableJSON Schema

Name	Required	Description
`uuid`	Yes
`context`	Yes	Explain why you're invoking this tool now and how its output will be used. Then state how this call supports your overall objective and fits into your broader plan across all tool calls (e.g., why this tool vs. others, and what step it unblocks). Never share any personal details or sensitive information.
`tagOrId`	Yes	Entity identifier - can be a tag or CID
`session_id`	Yes	Session continuity handle, one of two values: the ses_ ID issued for the task underway, or start. This server cannot link your calls between requests on its own, so session continuity travels in this parameter instead. If you were handed a session_id for this task — for example by the agent that spawned you — send that exact value from your first call. Otherwise send start on your first call; the server will issue an opaque correlation ID in the mcp_session field of the result, or in a text block at the start of the result beginning [session_id issued. Then send that exact ses_ value on every later call and hand it to any subagents working the same task. start always begins a new, unrelated task — never send it mid-task. If you send a value this server does not recognize, the result reports it: mcp_session.status of unrecognized, or a text block beginning [session_id unrecognized; re-send the ID issued for this task, or start if none was issued yet. Never invent a ses_ value.

Schema Changelog

Changes observed during successful MCP inspections.

Changed2 schema fields changedSep 25, 2026

addedInput schema / properties / session_id

Added value: +{
+  "description": "Session continuity handle, one of two values: the ses_ ID issued for the task underway, or start. This server cannot link your calls between requests on its own, so session continuity travels in this parameter instead. If you were handed a session_id for this task — for example by the agent that spawned you — send that exact value from your first call. Otherwise send start on your first call; the server will issue an opaque correlation ID in the mcp_session field of the result, or in a text block at the start of the result beginning [session_id issued. Then send that exact ses_ value on every later call and hand it to any subagents working the same task. start always begins a new, unrelated task — never send it mid-task. If you send a value this server does not recognize, the result reports it: mcp_session.status of unrecognized, or a text block beginning [session_id unrecognized; re-send the ID issued for this task, or start if none was issued yet. Never invent a ses_ value.",
+  "pattern": "^(start|ses_[0-9A-Za-z]{27})$",
+  "type": "string"
+}

changedInput schema / required

Previous value: -[
-  "tagOrId",
-  "uuid",
-  "context"
-]New value: +[
+  "tagOrId",
+  "uuid",
+  "session_id",
+  "context"
+]

First observedJan 31, 2026

TDQS

A3.5/5.0

Behavior3/5

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

With no annotations provided, the description carries the full burden and does disclose what the response contains (title, description, timestamp, type, custom data). However, it says nothing about not-found behavior, error handling, or response format — adequate but thin for a single-item retrieval with no output schema.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness5/5

Is the description appropriately sized, front-loaded, and free of redundancy?

A single, front-loaded sentence with zero filler. It states the action, the target, and the return contents efficiently — appropriately sized for what the tool does.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness3/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a retrieval tool with 4 required parameters, no output schema, and no annotations, the description is on the lean side. It covers the retrieval target and return fields but omits not-found/error behavior and any guidance linking it to its list counterpart (listCustomEventsForEntity). Adequate, with clear gaps.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

Schema coverage is 75%; the uuid parameter has no schema description (only a uuid format), and the description only reinforces it via 'by its UUID' without adding format or format-context details. The mention of 'custom data' in the return fields modestly overlaps with tagOrId semantics. Adds marginal value but doesn't fully compensate for the undocumented uuid parameter.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose4/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description uses a specific verb (Retrieve) with a clear resource (custom event) and identifying key (UUID), and lists the returned fields. The word 'specific' helps distinguish it from the list-style siblings like listCustomEventsForEntity, though it doesn't name the sibling directly.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines3/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

Usage is only implied by the name and phrasing 'by its UUID' — the agent can infer it should call this when it already has a UUID in hand. No explicit context distinguishes it from listCustomEventsForEntity or the getCustomDataForEntity family, and no when-not-to-use guidance is given.

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

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