update_tags_tool
A write tool on the Obsidian MCP server.
This record as markdown: /tools/adrienthebo-obsidian-mcp/update-tags-tool.md
What update_tags_tool does on Obsidian MCP Server
AI agents use update_tags_tool to create or update resources in Obsidian MCP Server, usually the action step of a workflow, after the agent has gathered context. Every call changes real data in your Obsidian MCP Server environment.
Why update_tags_tool is rated Medium
Updating tags on notes is a write operation that modifies metadata without permanently deleting data. The change is reversible—tags can be removed or changed again. While the description is empty, the tool name and context from sibling tools (add_tags_tool, batch_update_properties_tool) and server capabilities indicate this performs metadata modification.
From the tool's definition Tool name is 'update_tags_tool' and sibling tool 'add_tags_tool' confirms tag manipulation capability. Server description states it manages 'tags and links' and enables 'creating, and managing notes.' Tag updates modify note metadata reversibly.
Attacks that exploit this kind of access
The rule that runs update_tags_tool safely
PolicyLayer is an MCP gateway: it sits between your AI agents and Obsidian MCP Server, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For update_tags_tool, this is the rule to start with:
update_tags_tool 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 Obsidian MCP Server, apply this rule, and every update_tags_tool call is checked against it from then on.
Questions about update_tags_tool
update_tags_tool is a write tool on the Obsidian MCP Server MCP server. It is categorised as a Write tool in the Obsidian MCP Server MCP Server, which means it can create or modify data. Consider rate limits to prevent runaway writes.
Register the Obsidian MCP Server MCP server in PolicyLayer and add a rule for update_tags_tool: 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 Obsidian MCP Server. Nothing to install.
update_tags_tool 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 update_tags_tool 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 update_tags_tool. 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.
update_tags_tool is provided by the Obsidian MCP Server MCP server (adrienthebo/obsidian-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
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