write_note

3 findings on this tool

1. highexcessive agencyf-r3-write_note

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

   `write_note` 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 T0051CAST-01
2. highfilesystem egressf-r9-write_note

   Tool `write_note` writes to or deletes from the host filesystem

   `write_note` appears to write, create, move, or delete files on the host filesystem (Overwrite an existing note's full content (full REPLACE, not append) (Replaces the entire content of a note you own — the 'content' field overwrites the whole note body. There is no append mode. To grow a note, call read_note first, concatenate locally, and pass the combined text. Requires docking.)). An agent manipulated by an indirect-injection payload can target sensitive paths (SSH keys, shell configs, application secrets) or establish persistence via cron / systemd.

   fix: Restrict the tool to an explicit allow-list of safe directories. Validate all path parameters server-side, reject traversal sequences (`../`), and gate write / delete operations behind a capframe-bind `path starts_with /safe/dir` caveat.

   OWASP LLM08NIST MANAGE-2.2ATLAS T0051CAST-01
3. mediumunconstrained inputf-r1-write_note

   Tool `write_note` accepts unconstrained string input

   The following string parameter(s) have no `maxLength` constraint: `note_id`, `session_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 T0051CAST-03