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@jambonz/mcp-schema-server

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by jambonz

jambonz_developer_toolkit

Retrieve the developer guide, verb schemas, and pre-built agent tools to review available patterns before writing custom code.

Instructions

REQUIRED: call this before writing jambonz code. Returns the developer guide (verb model, transports, SDK API, patterns), lists all available schemas, and shows pre-built agent tools (weather, search, calculator, etc.) — check these before implementing custom toolHook handlers.

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Behavior3/5

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

No annotations provided, so description carries full burden. Describes the output but does not discuss side effects, auth needs, or state modifications. For a read-only knowledge retrieval tool, the disclosure is moderately adequate.

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

Conciseness5/5

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

Two sentences, front-loaded with key requirement, no wasted words. Perfectly concise and structured.

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

Completeness4/5

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

Given no parameters and no output schema, the description thoroughly describes the returned items (guide, schemas, tools). Could mention output format but is largely complete.

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

Parameters4/5

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

No parameters exist, so baseline is 4. The description adds value by explaining the output content beyond the empty schema.

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

Purpose5/5

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

The description clearly states the tool returns the developer guide, schemas, and pre-built tools. It distinguishes from siblings by being a prerequisite and advises checking pre-built tools before implementing custom handlers.

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

Usage Guidelines4/5

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

Explicitly says 'REQUIRED: call this before writing jambonz code' and 'check these before implementing custom toolHook handlers,' providing clear when-to-use guidance. Does not directly name sibling tools as alternatives but implies alternatives exist.

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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