manage_webhooks
List all registered webhooks or remove one by ID. Use action
This record as markdown: /tools/0xhashy-fathom-fyi/manage-webhooks.md
What manage_webhooks does on Fathom Fyi
AI agents use manage_webhooks to create or update resources in Fathom Fyi, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Fathom Fyi environment.
Why manage_webhooks is rated Medium
Removing webhooks is a reversible write operation—configurations can be recreated. It does not permanently destroy data, make financial transactions, or execute arbitrary code. However, it modifies system state by altering registered webhook handlers, which could disrupt monitoring or alerting if misused. Medium severity reflects that webhook removal affects system configuration but remains reversible.
From the tool's definition Tool performs modification operations: 'remove one by ID' indicates deletion/modification of webhook configurations. 'List all registered webhooks' is read-only, but the tool's primary function is management (removal) of webhooks.
Attacks that exploit this kind of access
The rule that runs manage_webhooks safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Fathom Fyi, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For manage_webhooks, this is the rule to start with:
manage_webhooks 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 Fathom Fyi, apply this rule, and every manage_webhooks call is checked against it from then on.
Questions about manage_webhooks
List all registered webhooks or remove one by ID. Use action. It is categorised as a Write tool in the Fathom Fyi MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Fathom Fyi MCP server in PolicyLayer and add a rule for manage_webhooks: 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 Fathom Fyi. Nothing to install.
manage_webhooks 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 manage_webhooks 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 manage_webhooks. 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.
manage_webhooks is provided by the Fathom Fyi MCP server (0xhashy/fathom-fyi). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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