Low Risk

stream_read

Read entries from stream.

How to control stream_read ↓

What stream_read does on Amazon Location Service MCP Server

AI agents call stream_read to retrieve information from Amazon Location Service MCP Server without modifying anything — typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Low Risk

Why stream_read needs a policy

This tool performs data retrieval (reading from a stream) with no capability to modify, delete, or execute operations. It is a passive query operation with minimal blast radius if misused—at worst, an agent could read sensitive stream data, but cannot alter system state or trigger external actions.

From the tool's definition Tool name 'stream_read' and description 'Read entries from stream' both indicate a read-only operation that retrieves data from a stream without modification or side effects.

Documented attack patterns abuse exactly the kind of access stream_read gives an agent:

How to control stream_read

PolicyLayer is an MCP gateway — it sits between your AI agents and Amazon Location Service MCP Server, and nothing reaches the server without passing your rules. This is the rule we recommend for stream_read:

policy.json
{
  "version": "1",
  "default": "deny",
  "tools": {
    "stream_read": {}
  }
}

stream_read is read-only, so it stays allowed — but everything else on the server is denied unless you say otherwise.

  1. Create a free account and register Amazon Location Service MCP Server — nothing to install.
  2. Add this policy — paste it, or build it visually.
  3. Point your MCP client (Claude, Cursor, anything) at your gateway URL.
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Related tools and policies

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Questions about stream_read

What does the stream_read tool do? +

Read entries from stream. It is categorised as a Read tool in the Amazon Location Service MCP Server MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on stream_read? +

Register the Amazon Location Service MCP Server MCP server in PolicyLayer and add a rule for stream_read: 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 Amazon Location Service MCP Server. Nothing to install.

What risk level is stream_read? +

stream_read is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit stream_read? +

Yes. Add a rate_limit block to the stream_read 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.

How do I block stream_read completely? +

Set action: deny in the PolicyLayer policy for stream_read. 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.

What MCP server provides stream_read? +

stream_read is provided by the Amazon Location Service MCP Server MCP server (awslabs.aws-location-mcp-server). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

Enforce policy on every Amazon Location Service MCP Server tool call.

Start from Amazon Location Service MCP Server, add the rest of your stack, and see everything your agents can call. Then put policy on all of it.

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805 Amazon Location Service MCP Server tools catalogued and risk-classified — across an index of 43,000+ MCP servers.

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