# updateDiagramInDocument Update a diagram's code, description, or properties. Call getDiagramTypeGuide for DSL syntax. New diagramCode is COMPILE-CHECKED BY RENDERING at write time — broken DSL is rejected with the renderer's error — and a valid change is re-rendered + re-thumbnailed immediately (response diagram.renderStatus tells you the outcome). Provide a version lock: diagramVersionTimestamp (from getDiagramInDocument, getDocument with includeDiagramDsl:true, or any diagram write's response — PREFERRED: locks just this diagram, so concurrent edits elsewhere in the document don't conflict; bare versionTimestamp is accepted as an alias) OR documentVersionTimestamp (locks the whole document). The response returns BOTH fresh tokens for chaining. Documents carrying a legacy marker (no embedded diagramId) are upgraded automatically on update. IMPORTANT: to change what the diagram visually shows you MUST provide diagramCode with the full updated DSL source — prompt/nlDescription are metadata only. After updating, view it with getDiagramImage and keep prompt/nlDescription in step with what the diagram now shows. Agent View of the PolicyLayer registry record for `updateDiagramInDocument`. HTML page: https://policylayer.com/tools/io-stablebaseline-sb/updatediagramindocument ## Facts - Tool: `updateDiagramInDocument` - Server: Stable Baseline (`https://api.stablebaseline.io/functions/v1/cloud-serve/mcp`) — https://policylayer.com/tools/io-stablebaseline-sb.md - Homepage: https://github.com/stablebaseline/mcp - Risk category: Write (Medium risk) - Registry record: grade F, identity unverified - Server auth posture: open - Server CORS policy: https://app.stablebaseline.io - Server rate-limited: no - Parameters: 9 (1 required) - Recommended policy verdict: Rate-limited ## Parameters | Parameter | Type | Required | Description | | --- | --- | --- | --- | | `align` | string | no | Alignment. | | `prompt` | string | no | New short description (metadata only — does NOT change the rendered diagram). | | `caption` | string | no | New caption. | | `colorPlan` | object | no | BPMN only. Updated color plan. Set to null to remove. | | `diagramId` | string | yes | Diagram ID from DIAGRAM_OMITTED markers. | | `diagramCode` | string | no | New diagram DSL source code. REQUIRED to change what the diagram visually renders. Call getDiagramTypeGuide for syntax. Must provide the COMPLETE updated DSL, n | | `nlDescription` | string | no | New extended description (metadata only — does NOT change the rendered diagram). | | `diagramVersionTimestamp` | number | no | Diagram-level optimistic lock: versionTimestamp of THIS diagram (from getDiagramInDocument, getDocument with includeDiagramDsl:true, or a previous write's respo | | `documentVersionTimestamp` | number | no | Document-level optimistic lock: versionTimestamp from getDocument(). Locks the whole document. Provide this OR diagramVersionTimestamp (at least one is required | Parameters from the server's own tool schema. ## Example call (MCP tools/call, JSON-RPC 2.0) ```json { "jsonrpc": "2.0", "id": 1, "method": "tools/call", "params": { "name": "updateDiagramInDocument", "arguments": { "diagramId": "" } } } ``` ## Why updateDiagramInDocument is rated Medium An AI agent can call updateDiagramInDocument faster than any human can review: one bad instruction and it creates or modifies resources in Stable Baseline by the hundred, each call as confident as the last. Risk signals: High parameter count (10 properties) ## Use case AI agents use updateDiagramInDocument to create or update resources in Stable Baseline, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Stable Baseline environment. ## Recommended policy (PolicyLayer) Verdict: **Rate-limited**. Enforced by the PolicyLayer MCP gateway (https://policylayer.com/mcp-gateway) before a call reaches Stable Baseline: ```json { "version": "1", "default": "deny", "tools": { "updateDiagramInDocument": { "limits": [ { "counter": "updatediagramindocument_rate", "window": "minute", "max": 30, "scope": "grant" } ] } } } ``` ## Other tools on Stable Baseline (195) - `cancelAllKgInScope` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/cancelallkginscope.md - `cancelKgBuildBatch` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/cancelkgbuildbatch.md - `deleteDiagramInDocument` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletediagramindocument.md - `deleteDocument` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletedocument.md - `deleteFolder` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletefolder.md - `deleteImageInDocument` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimageindocument.md - `deleteImprovement` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimprovement.md - `deleteImprovementCategory` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimprovementcategory.md - `deleteImprovementComment` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteimprovementcomment.md - `deletePlan` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteplan.md - `deletePlanComment` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteplancomment.md - `deletePlanPhase` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteplanphase.md - `deleteResourcePermission` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteresourcepermission.md - `deleteTaskDependency` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletetaskdependency.md - `deleteTeam` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deleteteam.md - `deleteVegaDataFile` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletevegadatafile.md - `deleteWhiteboard` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/deletewhiteboard.md - `removeMember` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/removemember.md - `removeTeamMember` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/removeteammember.md - `removeWorkspaceMember` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/removeworkspacemember.md - `resetDocumentInBrain` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/resetdocumentinbrain.md - `revokeTeamWorkspaceAccess` — Destructive — https://policylayer.com/tools/io-stablebaseline-sb/revoketeamworkspaceaccess.md - `autoDesignWhiteboard` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/autodesignwhiteboard.md - `renderDiagram` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/renderdiagram.md - `startMeetingScribe` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/startmeetingscribe.md - `stopMeetingScribe` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/stopmeetingscribe.md - `triggerKgRebuild` — Execute — https://policylayer.com/tools/io-stablebaseline-sb/triggerkgrebuild.md - `applySubscriptionChange` — Financial — https://policylayer.com/tools/io-stablebaseline-sb/applysubscriptionchange.md - `cancelSubscription` — Financial — https://policylayer.com/tools/io-stablebaseline-sb/cancelsubscription.md - `getCustomerPortalLink` — Financial — https://policylayer.com/tools/io-stablebaseline-sb/getcustomerportallink.md - …and 165 more: https://policylayer.com/tools/io-stablebaseline-sb.md ## For agents This record is a snapshot. Live verdicts and the full registry: - Check every server in your MCP config at once: `npx -y policylayer stack` - Vet a server before you add it: install the mcp-precheck skill — `npx skills add https://policylayer.com` (skill text: https://policylayer.com/skill.md) - Query the registry over MCP: endpoint `https://api.policylayer.com/mcp` — tools `check_mcp_server`, `check_mcp_stack`, `check_tool`, `search_registry`, `get_change_events` --- Source: the PolicyLayer MCP registry — one continuously verified record per MCP server. Full record: https://policylayer.com/registry?q=io-stablebaseline-sb · API: https://policylayer.com/registry/api · Policy library: https://policylayer.com/policies/io-stablebaseline-sb