schwab_stream_level2

Get a Level 2 snapshot from Schwab streaming cache for a symbol.

SERVEROpen Stocks MCP SOURCEopen-agent-tools/open-stocks-mcp

Low RISK CLASS

Category Read

Parameters 00 required

Recommended Allowedsee the rule below

Registry record Grade F, identity unverified Pull the record →

This record as markdown: /tools/open-agent-tools-open-stocks-mcp/schwab-stream-level2.md

WHAT IT DOES

What schwab_stream_level2 does on Open Stocks MCP

AI agents call schwab_stream_level2 to retrieve information from Open Stocks MCP without modifying anything. It is typically the context-gathering step in research, monitoring, and reporting workflows, before the agent takes action elsewhere.

RISK

Why schwab_stream_level2 is rated Low

This tool queries and retrieves real-time Level 2 market depth data from Schwab's streaming service. Level 2 snapshots are read-only market information (bid/ask prices at different price levels) with no side effects.

From the tool's definition Tool name contains 'get' semantics ('Get a Level 2 snapshot') and 'stream_level2' indicates retrieval of market data. Description explicitly states it retrieves data from 'streaming cache' for a symbol with no modification or execution capability implied.

Attacks that exploit this kind of access

RECOMMENDED RULE

The rule that runs schwab_stream_level2 safely

PolicyLayer is an MCP gateway: it sits between your AI agents and Open Stocks MCP, and checks every tool call against a rule you set before the call runs. Nothing changes on the server itself. For schwab_stream_level2, this is the rule to start with:

schwab_stream_level2 Allowed

schwab_stream_level2 is read-only, so it stays allowed. Everything else on the server is denied unless you say otherwise.

View as policy code

policy.json

{
  "version": "1",
  "default": "deny",
  "tools": {
    "schwab_stream_level2": {}
  }
}

ALLOW ONLY THIS TOOL → Instant setup, no code required.

The button opens the PolicyLayer dashboard: create your workspace, connect Open Stocks MCP, apply this rule, and every schwab_stream_level2 call is checked against it from then on.

FAQ

Questions about schwab_stream_level2

What does the schwab_stream_level2 tool do? +

Get a Level 2 snapshot from Schwab streaming cache for a symbol. It is categorised as a Read tool in the Open Stocks MCP MCP Server, which means it retrieves data without modifying state.

How do I enforce a policy on schwab_stream_level2? +

Register the Open Stocks MCP server in PolicyLayer and add a rule for schwab_stream_level2: 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 Open Stocks MCP. Nothing to install.

What risk level is schwab_stream_level2? +

schwab_stream_level2 is a Read tool with low risk. Read-only tools are generally safe to allow by default.

Can I rate-limit schwab_stream_level2? +

Yes. Add a rate_limit block to the schwab_stream_level2 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 schwab_stream_level2 completely? +

Set action: deny in the PolicyLayer policy for schwab_stream_level2. 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 schwab_stream_level2? +

schwab_stream_level2 is provided by the Open Stocks MCP server (open-agent-tools/open-stocks-mcp). PolicyLayer sits as a proxy in front of this server to enforce policies before tool calls reach the server.

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