portal_session_cancel
Cancel a client's session on behalf of the client (client-initiated cancellation: cancelledBy=client). Allowed from scheduled/pending_confirmation/confirmed; rejects past sessions. Idempotent: a session already cancelled returns alreadyCancelled=true. Distinct from the admin cancellation with can...
This record as markdown: /tools/com-servicialo-mcp-server/portal-session-cancel.md
What portal_session_cancel does on Servicialo
AI agents call portal_session_cancel to permanently remove resources in Servicialo, typically in cleanup and lifecycle workflows. It does its job in a single call, and there is no undo.
| Parameter | Type | Required | Description |
|---|---|---|---|
apiKey | string | — | |
orgSlug | string | Yes | |
sessionId | string | Yes | |
cancellationReason | string | — |
Parameters from the server's own tool schema.
Why portal_session_cancel is rated Critical
Although framed as a client-portal action, this tool irreversibly cancels sessions — a state change that cannot be undone without re-scheduling and cannot be reversed by the tool itself. This fits Destructive (irreversible state removal) rather than Write (reversible modification).
From the tool's definition Tool description states it "Cancel[s] a client's session" and explicitly distinguishes this from admin cancellation by noting it is "client-initiated cancellation".
Risk signalsHandles credentials or secrets (apiKey) · Admin/system-level operation
Attacks that exploit this kind of access
The rule that runs portal_session_cancel safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Servicialo, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For portal_session_cancel, this is the rule to start with:
portal_session_cancel is removed from the agent's tool list entirely, so the agent never calls it. The rest of the server keeps working.
The button opens the PolicyLayer dashboard: create your workspace, connect Servicialo, apply this rule, and every portal_session_cancel call is checked against it from then on.
Questions about portal_session_cancel
Cancel a client's session on behalf of the client (client-initiated cancellation: cancelledBy=client). Allowed from scheduled/pending_confirmation/confirmed; rejects past sessions. Idempotent: a session already cancelled returns alreadyCancelled=true. Distinct from the admin cancellation with cancellation-policy charges — this is the client-portal cancel flow. The org API key owner is recorded as the actor acting on behalf of the client (ADR-004 §6). It is categorised as a Destructive tool in the Servicialo MCP Server, which means it can permanently delete or destroy data. Block by default and require explicit approval.
portal_session_cancel accepts 4 parameters: apiKey, orgSlug, sessionId, cancellationReason. Required: orgSlug, sessionId. The full parameter table on this page comes from the server's own tool schema.
Register the Servicialo MCP server in PolicyLayer and add a rule for portal_session_cancel: allow, deny, rate-limit, or require approval. Point your MCP client at the PolicyLayer proxy URL and the rule is enforced on every call, before it reaches Servicialo. Nothing to install.
portal_session_cancel is a Destructive tool with critical risk. Critical-risk tools should be blocked by default and only enabled with explicit human approval.
Yes. Add a rate_limit block to the portal_session_cancel rule in your PolicyLayer policy. For example, setting max: 10 and window: 60 limits the tool to 10 calls per minute. Rate limits are tracked per agent session and reset automatically.
Set action: deny in the PolicyLayer policy for portal_session_cancel. The AI agent will receive a policy violation error and cannot call the tool. You can also include a reason field to explain why the tool is blocked.
portal_session_cancel is provided by the Servicialo MCP server (@servicialo/mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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