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hash_get

Get field from hash. Args: key: The name of the key field: The field name Returns: Field value or error message

SERVERAWS SOURCE@awslabs/mcp
Low RISK CLASS
Category Read
Parameters 00 required
Recommended Allowedsee the rule below
Registry record Grade F, identity verified Pull the record →

This record as markdown: /tools/aws/hash-get.md

What hash_get does on AWS

AI agents call hash_get to retrieve information from AWS without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

Why hash_get is rated Low

This tool performs a simple read operation on a hash data structure, retrieving a field value by key. It has no capability to modify, delete, or execute code. The sibling tools include destructive operations (delete_*), write operations (attach_*, add_*), and execute operations (analyze_*, audit_*), but hash_get is purely a retrieval function, making it a Read category risk with low severity.

From the tool's definition Tool description states 'Get field from hash' with returns 'Field value or error message'. The verb 'Get' and the operation of retrieving a field value indicate data retrieval with no modification or side effects.

Questions about hash_get

What does the hash_get tool do? +

Get field from hash. Args: key: The name of the key field: The field name Returns: Field value or error message. It is categorised as a Read tool in the AWS MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on hash_get? +

Register the AWS MCP server in PolicyLayer and add a rule for hash_get: 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 AWS. Nothing to install.

What risk level is hash_get? +

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

Can I rate-limit hash_get? +

Yes. Add a rate_limit block to the hash_get 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 hash_get completely? +

Set action: deny in the PolicyLayer policy for hash_get. 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 hash_get? +

hash_get is provided by the AWS MCP server (@awslabs/mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

More on AWS, and thousands of servers like it.

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