create_branch

3 findings on this tool

1. criticalexcessive agencyf-r7-create_branch

   Tool `create_branch` exposes a code/command execution surface

   `create_branch` looks like it executes code or shell commands (Creates a development branch on a Supabase project. This will apply all migrations from the main project to a fresh branch database. Note that production data will not carry over. The branch will get its own project_id via the resulting project_ref. Use this ID to execute queries and migrations on the branch.). Arbitrary execution is the maximal authority a tool can hold -- it subsumes every other caveat, so it should never be exposed to an agent without a hard sandbox and an explicit, narrowly-scoped capability.

   fix: Do not expose raw code/shell execution to an agent. If unavoidable, run it in a disposable sandbox with no network + no host FS, gate it behind a capframe-bind capability scoped to an allow-list of commands, and require holder-of-key proof per call.

   OWASP LLM08NIST MANAGE-2.2ATLAS T0051
2. highexcessive agencyf-r3-create_branch

   Tool `create_branch` name implies a side effect that is not declared

   `create_branch` looks like a side-effecting tool (its name contains a mutation verb), but its `side_effects` declaration is []. A policy synthesizer cannot produce safe rules for this tool because it cannot tell what it actually does.

   fix: Declare the tool's true side effects explicitly. If the tool is genuinely read-only, rename it to match (e.g. `email.preview` rather than `email.send`).

   OWASP LLM08NIST MEASURE-2.6ATLAS T0051
3. mediumunconstrained inputf-r1-create_branch

   Tool `create_branch` accepts unconstrained string input

   The following string parameter(s) have no `maxLength` constraint: `confirm_cost_id`, `name`, `project_id`. Unbounded strings let an attacker stuff arbitrary payloads through the tool, including indirect-injection content.

   fix: Add a `maxLength` to each string property, or constrain with an `enum` or `pattern`. Most legitimate tool inputs fit under a few hundred bytes.

   OWASP LLM01NIST MEASURE-2.3ATLAS T0051