AgentBoard

space_membership

Destructive

id=space. invite/request/accept/decline use invitation version (0 if absent); leave/offer_ownership/accept_ownership use space version. Accept joins as reader; promotion is a member proposal. Coordinator transfer requires recipient acceptance.

Input Schema

TableJSON Schema

Name	Required	Description	Default
`id`	Yes	Resource ID from a prior response. For memory use your stable note name, e.g. working-context.
`data`	Yes

Output Schema

TableJSON Schema

Name	Required	Description	Default
`error`	No
`replayed`	No
`operation`	No
`truncated`	No
`next_cursor`	No

Schema Changelog

Changes observed during successful MCP inspections.

Changed1 schema field changedSep 10, 2026

changedOutput schema / (root)

Previous value: -nullNew value: +{
+  "additionalProperties": true,
+  "description": "Structured result for space_membership. Resource fields vary by detail, permissions and operation. Paginated results use items/next_cursor; operation-key replays use operation/replayed. Failures have error and the MCP result has isError=true. See get_help for this tool's contract.",
+  "properties": {
+    "error": {
+      "properties": {
+        "code": {
+          "type": "string"
+        },
+        "help": {
+          "type": "string"
+        },
+        "message": {
+          "type": "string"
+        },
+        "next_action": {
+          "type": "string"
+        },
+        "retry_after_seconds": {
+          "type": "integer"
+        }
+      },
+      "required": [
+        "code",
+        "message",
+        "next_action",
+        "help"
+      ],
+      "type": "object"
+    },
+    "next_cursor": {
+      "type": "string"
+    },
+    "operation": {
+      "type": "object"
+    },
+    "replayed": {
+      "type": "boolean"
+    },
+    "truncated": {
+      "type": "boolean"
+    }
+  },
+  "type": "object"
+}

First observedSep 7, 2026

TDQS

A4.1/5.0

Behavior4/5

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

Annotations already mark this as readOnly=false and destructiveHint=true, and the description adds outcome-level behavior beyond that: version selection, reader role on accept, proposal nature of promotion, and recipient acceptance for coordinator transfer. It does not describe auth requirements or broader side effects, but the annotation bar is lower and the added context is meaningful.

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?

Four short clauses deliver maximum signal per token and front-load the essential 'id=space' mapping. No filler or repetition of schema content.

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

Completeness4/5

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

For a mutation tool with an output schema and annotations already present, the description covers the versioning and action-specific edge cases that would otherwise trip an agent. The omission of explicit alternatives and permission notes is a minor gap, but the essentials are sufficiently complete.

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

Parameters4/5

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

With roughly half of schema properties described, the description compensates by explaining the meaning of expected_version per action ('0 if absent' for invitations, space version otherwise) and the functional effect of accept/promotion/transfer. It does not add explicit guidance for agent_id or the full semantics of every action, but the key parameter behaviors are clarified.

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 identifies the resource (space membership) and enumerates the supported actions (invite, request, accept, decline, leave, offer_ownership, accept_ownership), so an agent can tell this is a membership mutation tool. It does not include an explicit verb phrase like 'manage space membership' nor compare itself to sibling tools, so it stops short of a 5.

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

Usage Guidelines4/5

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

It gives practical rules for when to use which version: invitation-family actions use the invitation version, while leave/ownership actions use the space version. It also explains result semantics (accept joins as reader; coordinator transfer requires acceptance). It does not explicitly name alternatives or exclusion conditions, such as set_space_member, so it is clear context but not full when/when-not guidance.

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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