Preview a Renovate `customManagers` entry against a local repo — fast, offline, no `renovate` invocation. Designed for iterating on a regex: shows which files match `fileMatch`, which lines match each `matchStrings` regex (with named capture groups), and what dep info the template fields produce....
High parameter count (21 properties)
Part of the Renovate MCP server. Enforce policies on this tool with Intercept, the open-source MCP proxy.
AI agents invoke preview_custom_manager to trigger processes or run actions in Renovate. Execute operations can have side effects beyond the immediate call -- triggering builds, sending notifications, or starting workflows. Rate limits and argument validation are essential to prevent runaway execution.
preview_custom_manager can trigger processes with real-world consequences. An uncontrolled agent might start dozens of builds, send mass notifications, or kick off expensive compute jobs. Intercept enforces rate limits and validates arguments to keep execution within safe bounds.
Execute tools trigger processes. Rate-limit and validate arguments to prevent unintended side effects.
tools:
preview_custom_manager:
rules:
- action: allow
rate_limit:
max: 10
window: 60
validate:
required_args: trueSee the full Renovate policy for all 11 tools.
Agents calling execute-class tools like preview_custom_manager have been implicated in these attack patterns. Read the full case and prevention policy for each:
Other tools in the Execute risk category across the catalogue. The same policy patterns (rate-limit, validate) apply to each.
preview_custom_manager is one of the high-risk operations in Renovate. For the full severity-focused view — only the high-risk tools with their recommended policies — see the breakdown for this server, or browse all high-risk tools across every MCP server.
Preview a Renovate `customManagers` entry against a local repo — fast, offline, no `renovate` invocation. Designed for iterating on a regex: shows which files match `fileMatch`, which lines match each `matchStrings` regex (with named capture groups), and what dep info the template fields produce. Limitations vs. a real Renovate run: - Only `customType: "regex"` is supported. - `matchStringsStrategy` other than `any` (the default) is not implemented; a warning is emitted. - Template substitution handles only `{{groupName}}` references, not full Handlebars helpers. - `.gitignore` (and `.git/info/exclude`, plus nested `.gitignore`s) is honored like `git` does. `node_modules/` and `.git/` are always skipped as a safety net, even without a `.gitignore`. Run the `dry_run` tool afterwards for full-fidelity confirmation.. It is categorised as a Execute tool in the Renovate MCP Server, which means it can trigger actions or run processes. Use rate limits and argument validation.
Add a rule in your Intercept YAML policy under the tools section for preview_custom_manager. You can allow, deny, rate-limit, or validate arguments. Then run Intercept as a proxy in front of the Renovate MCP server.
preview_custom_manager is a Execute tool with high risk. Execute tools should be rate-limited and have argument validation enabled.
Yes. Add a rate_limit block to the preview_custom_manager rule in your Intercept 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 Intercept policy for preview_custom_manager. 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.
preview_custom_manager is provided by the Renovate MCP server (renovate-mcp). Intercept sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic policy on every MCP tool call. Per-identity grants. Full audit log.