AI agents call get_book_best_reviews to retrieve information from Weread without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.
| Parameter | Type | Required | Description |
|---|---|---|---|
count | integer | — | Number of reviews to return |
book_id | string | Yes | Book ID |
max_idx | integer | — | Pagination index |
synckey | integer | — | Sync key for pagination |
Parameters from the server's own tool schema.
This tool retrieves and queries existing review data for a book. It performs a read-only operation with no capability to modify, delete, or execute code. The action is informational in nature, returning public book reviews without any reversible or irreversible changes to data.
From the tool's definition Tool name 'get_book_best_reviews' and description 'Get popular reviews for a specific book' indicate data retrieval with no modification or side effects.
Attacks that exploit this kind of access
Get popular reviews for a specific book. It is categorised as a Read tool in the Weread MCP Server, which means it retrieves data without modifying state.
get_book_best_reviews accepts 4 parameters: count, book_id, max_idx, synckey. Required: book_id. The full parameter table on this page comes from the server's own tool schema.
Register the Weread MCP server in PolicyLayer and add a rule for get_book_best_reviews: 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 Weread. Nothing to install.
get_book_best_reviews 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 get_book_best_reviews 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 get_book_best_reviews. 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.
get_book_best_reviews is provided by the Weread MCP server (mcp-server-weread). 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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