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ankur106

MCP LLDB Server

by ankur106

LLDB_FRAME_INFO

Retrieve details about a specific stack frame in an LLDB debugging session using its frame index.

Instructions

Display frame information

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
sessionIdYesLLDB session ID
frameIndexYesFrame index
Behavior2/5

Does the description disclose side effects, auth requirements, rate limits, or destructive behavior?

No annotations are present, so the description must fully disclose behavioral traits. It only states 'Display frame information' without mentioning side effects, dependencies (e.g., active session), or output characteristics. Critical context for a debugging tool is missing.

Agents need to know what a tool does to the world before calling it. Descriptions should go beyond structured annotations to explain consequences.

Conciseness3/5

Is the description appropriately sized, front-loaded, and free of redundancy?

The description is extremely short (one sentence), which is concise but at the cost of substance. It does not earn its place as it provides no additional value beyond the tool name.

Shorter descriptions cost fewer tokens and are easier for agents to parse. Every sentence should earn its place.

Completeness2/5

Given the tool's complexity, does the description cover enough for an agent to succeed on first attempt?

For a simple tool with 2 required parameters and no output schema, the description should still clarify what 'frame information' entails and how it fits into the debugging workflow. The absence of such context makes it incomplete for an AI agent to use correctly.

Complex tools with many parameters or behaviors need more documentation. Simple tools need less. This dimension scales expectations accordingly.

Parameters3/5

Does the description clarify parameter syntax, constraints, interactions, or defaults beyond what the schema provides?

The input schema has 100% description coverage, so baseline is 3. The description adds no information beyond the parameter names and types already in the schema, so it does not improve parameter understanding.

Input schemas describe structure but not intent. Descriptions should explain non-obvious parameter relationships and valid value ranges.

Purpose3/5

Does the description clearly state what the tool does and how it differs from similar tools?

The description 'Display frame information' clearly states a verb and resource, but it is vague and does not specify what aspect of frame information is shown (e.g., variables, registers, stack depth). Compared to siblings like LLDB_BACKTRACE and LLDB_INFO_REGISTERS, the purpose is not well differentiated.

Agents choose between tools based on descriptions. A clear purpose with a specific verb and resource helps agents select the right tool.

Usage Guidelines2/5

Does the description explain when to use this tool, when not to, or what alternatives exist?

No guidance is provided on when to use this tool versus alternatives like LLDB_BACKTRACE or LLDB_PRINT. There is no mention of context, prerequisites, or exclusions.

Agents often have multiple tools that could apply. Explicit usage guidance like "use X instead of Y when Z" prevents misuse.

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