Replace content in an existing Bear note — either the full body or a specific section. Use bear-search-notes first to get the note ID. To add text without replacing existing content use bear-add-text instead. Requires the note
AI agents use bear-replace-text to create or update resources in Bear Notes — usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Bear Notes environment.
This tool modifies note content but does not permanently delete data—the replaced content could theoretically be recovered through Bear's version history or undo functionality. It is reversible (Write), not irreversible (Destructive). The severity is medium because an AI agent could corrupt or overwrite important notes, but the impact is limited to a single note's content and potentially recoverable.
From the tool's definition Tool description explicitly states 'Replace content in an existing Bear note' and 'To add text without replacing existing content use bear-add-text instead', clearly indicating this modifies existing data reversibly.
Documented attack patterns abuse exactly the kind of access bear-replace-text gives an agent:
PolicyLayer is an MCP gateway — it sits between your AI agents and Bear Notes, and nothing reaches the server without passing your rules. This is the rule we recommend for bear-replace-text:
{
"version": "1",
"default": "deny",
"tools": {
"bear-replace-text": {
"limits": [
{
"counter": "bear-replace-text_rate",
"window": "minute",
"max": 30,
"scope": "grant"
}
]
}
}
}bear-replace-text 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.
Free to start. No card required.
Replace content in an existing Bear note — either the full body or a specific section. Use bear-search-notes first to get the note ID. To add text without replacing existing content use bear-add-text instead. Requires the note. It is categorised as a Write tool in the Bear Notes MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Bear Notes MCP server in PolicyLayer and add a rule for bear-replace-text: 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 Bear Notes. Nothing to install.
bear-replace-text 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 bear-replace-text 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 bear-replace-text. 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.
bear-replace-text is provided by the Bear Notes MCP server (vasylenko/bear-notes-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Deterministic rules across all 13 Bear Notes tools. Per-identity grants. Full audit log. Live in minutes. Nothing to install.
Free to start. No card required.
13 Bear Notes tools catalogued and risk-classified — across an index of 42,500+ MCP servers.