Use when: you want the catalog of keywords (tags) in the library — e.g. to discover exact keyword spellings before filtering query by keyword, or to see which tags are most used. Pass limit for the top-N.\n
AI agents call list-keywords to retrieve information from Apple Photos without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
This tool queries and lists existing metadata (keywords/tags) from the Apple Photos library without creating, modifying, deleting, or executing external operations. It is purely informational retrieval with no destructive or state-changing capability. Severity is low because exposure of keyword/tag names poses minimal security risk.
From the tool's definition Tool name is 'list-keywords' and description states it retrieves 'the catalog of keywords (tags) in the library' — a read-only query operation with no data modification or external side effects.
Attacks that exploit this kind of access
Use when: you want the catalog of keywords (tags) in the library — e.g. to discover exact keyword spellings before filtering query by keyword, or to see which tags are most used. Pass limit for the top-N.\n. It is categorised as a Read tool in the Apple Photos MCP Server, which means it retrieves data without modifying state.
Register the Apple Photos MCP server in PolicyLayer and add a rule for list-keywords: 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 Apple Photos. Nothing to install.
list-keywords is a Read tool with low risk. Read-only tools are generally safe to allow by default.
Yes. Add a rate_limit block to the list-keywords 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 list-keywords. 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.
list-keywords is provided by the Apple Photos MCP server (sweetrb/apple-photos-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.
Every MCP server has a record like this.
Type a name, get the same breakdown: verified identity, auth posture, risk grade, capabilities, recommended policy.
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