create_webhook
Create an outbound webhook endpoint. IMPORTANT: the response includes a signingSecret that is returned only once - show it to the user immediately so they can store it and verify webhook signatures. If events is omitted, a default set of event types is subscribed.
This record as markdown: /tools/io-github-polnikale-sequenzy-mcp/create-webhook.md
What create_webhook does on Sequenzy Mcp
AI agents use create_webhook to create or update resources in Sequenzy Mcp, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Sequenzy Mcp environment.
Why create_webhook is rated Medium
This tool creates a new webhook configuration, which is a Write action (reversible data creation). Severity is medium because: (1) webhooks can transmit sensitive subscriber/campaign data to external endpoints, (2) misconfiguration could expose data to unintended recipients, (3) the tool generates cryptographic secrets that if exposed could allow attackers to forge webhook signatures and inject false events into the…
From the tool's definition Tool name 'create_webhook' and description 'Create an outbound webhook endpoint' indicate creation of a new resource. The mention of 'signingSecret' suggests generation of sensitive credentials.
Attacks that exploit this kind of access
The rule that runs create_webhook safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Sequenzy Mcp, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For create_webhook, this is the rule to start with:
create_webhook stays usable, but capped: an agent stuck in a loop can't make hundreds of changes a minute. Everything else on the server is denied unless you say otherwise.
The button opens the PolicyLayer dashboard: create your workspace, connect Sequenzy Mcp, apply this rule, and every create_webhook call is checked against it from then on.
Questions about create_webhook
Create an outbound webhook endpoint. IMPORTANT: the response includes a signingSecret that is returned only once - show it to the user immediately so they can store it and verify webhook signatures. If events is omitted, a default set of event types is subscribed. It is categorised as a Write tool in the Sequenzy Mcp MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Sequenzy MCP server in PolicyLayer and add a rule for create_webhook: 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 Sequenzy Mcp. Nothing to install.
create_webhook is a Write tool with medium risk. Write tools should be rate-limited to prevent accidental bulk modifications.
Yes. Add a rate_limit block to the create_webhook 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 create_webhook. 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.
create_webhook is provided by the Sequenzy MCP server (Sequenzy/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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