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lucasgerads

pymcuprog-mcp

by lucasgerads

pymcuprog-mcp

MCP server wrapping pymcuprog so AI tools (Claude Code, Claude Desktop, etc.) can program Microchip AVR microcontrollers via natural language.

Supports USB HID debuggers (nEDBG, PICkit 4, Atmel-ICE, MPLAB Snap, …) and serial UART UPDI adapters.

Installation

No installation needed if you use uvx — it runs the server directly from PyPI on demand (see .mcp.json examples below).

To install as a persistent tool:

uv tool install pymcuprog-mcp

Or with pip:

pip install pymcuprog-mcp

From source:

git clone https://github.com/lucasgerads/pymcuprog-mcp
cd pymcuprog-mcp
pip install -e .

Related MCP server: arduino-mcp-server

Configuration

The server is configured via environment variables. The two most important ones are PYMCUPROG_DEVICE (target MCU name, e.g. atmega4808) and PYMCUPROG_TOOL (debugger type, e.g. nedbg).

Variable

Description

Default

PYMCUPROG_DEVICE

Target device name (e.g. atmega4808, attiny416)

PYMCUPROG_TOOL

Debugger type (nedbg, pickit4, atmelice, snap, …)

any connected

PYMCUPROG_SERIALNUMBER

USB serial number substring (to pick a specific tool)

PYMCUPROG_SERIALPORT

Serial port for UART UPDI mode (e.g. /dev/ttyUSB0, COM3)

PYMCUPROG_BAUDRATE

Baud rate for serial UPDI mode

115200

PYMCUPROG_PROJECT_DIR

Default project directory for the build_and_flash tool

Setting PYMCUPROG_SERIALPORT switches the server into serial UPDI mode (uses a plain USB-serial adapter instead of a Microchip debugger).

.mcp.json examples

All examples use uvx, which downloads and runs the server directly from PyPI with no prior installation step.

USB HID debugger (nEDBG / Curiosity Nano)

{
  "mcpServers": {
    "pymcuprog": {
      "command": "uvx",
      "args": ["pymcuprog-mcp"],
      "env": {
        "PYMCUPROG_DEVICE": "atmega4808",
        "PYMCUPROG_TOOL": "nedbg"
      }
    }
  }
}

PICkit 4 or MPLAB Snap

{
  "mcpServers": {
    "pymcuprog": {
      "command": "uvx",
      "args": ["pymcuprog-mcp"],
      "env": {
        "PYMCUPROG_DEVICE": "attiny416",
        "PYMCUPROG_TOOL": "pickit4"
      }
    }
  }
}

Serial UART UPDI (cheap USB-serial adapter)

{
  "mcpServers": {
    "pymcuprog": {
      "command": "uvx",
      "args": ["pymcuprog-mcp"],
      "env": {
        "PYMCUPROG_DEVICE": "avr128da48",
        "PYMCUPROG_SERIALPORT": "/dev/ttyUSB0",
        "PYMCUPROG_BAUDRATE": "115200"
      }
    }
  }
}

Multiple tools on the same machine (select by serial number)

{
  "mcpServers": {
    "pymcuprog-board-a": {
      "command": "uvx",
      "args": ["pymcuprog-mcp"],
      "env": {
        "PYMCUPROG_DEVICE": "atmega4808",
        "PYMCUPROG_TOOL": "nedbg",
        "PYMCUPROG_SERIALNUMBER": "MCHP0001"
      }
    },
    "pymcuprog-board-b": {
      "command": "uvx",
      "args": ["pymcuprog-mcp"],
      "env": {
        "PYMCUPROG_DEVICE": "atmega4808",
        "PYMCUPROG_TOOL": "nedbg",
        "PYMCUPROG_SERIALNUMBER": "MCHP0002"
      }
    }
  }
}

Claude Code (via CLI)

claude mcp add pymcuprog -e PYMCUPROG_DEVICE=atmega4808 -e PYMCUPROG_TOOL=nedbg -- uvx pymcuprog-mcp

Available tools

Tool

Description

list_supported_devices

All device names pymcuprog knows (no hardware needed)

list_connected_tools

USB HID debuggers currently attached

ping

Read device ID bytes to verify connectivity

erase

Chip erase or erase a specific memory area

flash

Erase + write + verify + release in one call (recommended)

build_and_flash

Run make in a project directory, then flash the resulting .hex

write_hex

Program a .hex file with manual control over erase/verify steps

verify_hex

Compare target memory to a .hex file

read_memory

Read raw bytes from flash, EEPROM, fuses, etc.

write_memory

Write raw hex bytes to fuses, EEPROM, user_row, etc.

hold_in_reset

Hold target in reset

release_from_reset

Release target from reset

disconnect

Close the persistent debugger session

read_target_voltage

Measure target VCC

read_supply_voltage

Read debugger supply setpoint

set_supply_voltage

Set debugger supply voltage output

read_tool_info

Read debugger firmware/hardware info

Typical workflow: pingflash or pingbuild_and_flash

All programming tools accept optional device, tool, serialport, etc. parameters to override the environment variables on a per-call basis.

Available Tools

18 tools
build_and_flashB

Build a project with make and flash the result to the target device.

project_dir: path to the directory containing the Makefile. Falls back to the PYMCUPROG_PROJECT_DIR environment variable if not provided. Runs 'make -C project_dir', finds the generated .hex file, then erases, writes, verifies, and releases the target. Returns 'OK' on success; raises with build output on compile failure.

ParametersJSON Schema
NameRequiredDescriptionDefault
project_dirNo
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.4/5.0
Behavior4/5

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

No annotations exist, so description carries full burden. It details the build process, flash steps (erase, write, verify, release), and error behavior, offering good transparency.

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

Conciseness4/5

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

Three sentences with step listing—no fluff, but the param explanations are missing. Still efficient for the information provided.

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?

Despite having an output schema, the description omits explanations for most parameters and does not address prerequisite steps or device selection, making it incomplete for a build+flash operation.

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

Parameters1/5

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

Only project_dir is explained; the other five parameters (device, tool, serialnumber, etc.) are entirely undocumented despite 0% schema coverage, failing to add meaning.

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 combines building with make and flashing, distinguishing it from sibling tools like flash or erase.

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

Usage Guidelines3/5

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

Provides some context about project_dir and fallback to environment variable, but lacks explicit guidance on when to use this tool versus alternatives like build alone or flash alone.

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

disconnectA

Close the persistent programming session.

Call this to cleanly release the debugger connection, for example before unplugging the programmer or switching to a different target. Returns 'OK' on success.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.2/5.0
Behavior3/5

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

No annotations provided; description carries full burden. It mentions 'cleanly release' and return 'OK' on success, but doesn't detail behavior if called when not connected or any side effects. Minimal but 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?

Three sentences, front-loaded with main action, no wasted words. Efficiently communicates purpose and usage.

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 low complexity (0 params) and presence of output schema, the description covers core aspects: action, usage context, and return. Could mention idempotency but not essential.

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 in schema (100% coverage), so description adds value by explaining the action and return value. Baseline 4 applies as it adds meaning beyond the 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 it 'Close the persistent programming session' and 'release the debugger connection', which is a specific verb and resource. It distinguishes from siblings like ping or hold_in_reset by focusing on session cleanup.

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 provides when to use: 'for example before unplugging the programmer or switching to a different target.' No when-not or alternatives, but it's adequate for a simple cleanup tool.

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

eraseB

Erase target device memory.

memory='all' performs a chip erase (default). For AVR, chip erase does not erase EEPROM if the EESAVE fuse is set. Other valid memory values: 'flash', 'eeprom', 'user_row'. Returns 'OK' on success. Use erase before write_hex when the target is not blank.

ParametersJSON Schema
NameRequiredDescriptionDefault
memoryNoall
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.1/5.0
Behavior3/5

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

No annotations are provided, so the description must disclose behavior. It explains the effect of memory='all' (chip erase), the AVR-specific EESAVE fuse behavior, and lists other memory values. It also states the return value ('OK'). However, it does not mention error conditions, permissions required, or potential side effects like irreversible data loss.

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

Conciseness4/5

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

The description is concise with 5 sentences, each adding distinct information: basic function, default behavior, AVR detail, valid values, return value, and usage hint. No redundant or irrelevant content.

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?

Given the tool has 6 parameters and no annotations, the description is insufficiently complete. It omits explanations for 5 parameters and does not describe the output schema (though context indicates one exists). The usage hint is helpful but does not compensate for the missing parameter documentation.

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

Parameters2/5

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

Of the 6 parameters, only 'memory' is described in detail (values: all, flash, eeprom, user_row). The other 5 parameters (device, tool, serialnumber, serialport, baudrate) are not explained, despite having 0% schema description coverage. The description adds partial value but fails to clarify the full parameter set.

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

Purpose4/5

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

The description clearly states the tool erases target device memory and specifies default behavior (chip erase) along with valid memory values. It does not explicitly distinguish from sibling tools like write_hex or flash, but the verb 'erase' and context make the purpose unambiguous.

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

Usage Guidelines3/5

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

The description includes a specific usage recommendation: 'Use erase before write_hex when the target is not blank.' However, it does not provide when-not-to-use guidance or compare with alternatives like write_memory or flash.

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

flashC

Erase, write, and verify a hex file in one operation.

This is the recommended way to program a device. It erases the target, writes the hex file, and verifies the result. hexfile: absolute path to the .hex file on disk. Returns 'OK' on success.

ParametersJSON Schema
NameRequiredDescriptionDefault
hexfileYes
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

C2.9/5.0
Behavior3/5

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

With no annotations, the description must convey behavioral traits. It discloses that the tool erases (destructive), writes, and verifies, and returns 'OK'. However, it does not mention error handling, required privileges, or potential side effects beyond erasure.

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

Conciseness4/5

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

The description is concise with three sentences, but the parameter explanation is inserted inline rather than structured. It could be more front-loaded with the operation summary, but overall it is not verbose.

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?

Given 6 parameters (only 1 explained) and an output schema that likely contains more than just 'OK', the description is incomplete. It does not cover optional parameters or elaborate on output, despite having high complexity.

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

Parameters2/5

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

Schema description coverage is 0%, so the description must explain parameters. It only describes hexfile with 'absolute path to the .hex file on disk', leaving five other parameters (device, tool, serialnumber, etc.) unexplained without any defaults or usage context.

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

Purpose4/5

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

The description clearly states that the tool erases, writes, and verifies a hex file in one operation, making the core purpose explicit. However, it does not differentiate from sibling tools like write_hex or erase beyond calling it the 'recommended way'.

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?

The description says 'this is the recommended way to program a device' but provides no explicit guidance on when to use this tool versus alternatives like write_hex, verify_hex, or build_and_flash. It lacks when-not-to-use or prerequisite conditions.

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

get_configA

Return the current server configuration read from environment variables.

Call this first to confirm what device and tool are configured before running any programming operations. No hardware connection is required.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.4/5.0
Behavior4/5

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

Without annotations, the description carries full burden. It discloses that the tool is a read operation, requires no hardware, and reads from environment variables. This is sufficient for an agent to understand its behavior.

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?

The description is two sentences, front-loaded with the main purpose, and every sentence adds value. No wasted words.

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 that an output schema exists (though not provided here), the description covers the tool's purpose, usage, and constraints. It does not detail the return structure, but the output schema handles that. Reasonably 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?

The tool has no parameters, so the description naturally adds no parameter information beyond the schema. Baseline is 4 for 0 parameters.

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 that the tool returns server configuration from environment variables. It uses specific verbs ('return', 'confirm') and distinguishes itself from sibling tools that perform hardware operations.

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?

The description explicitly says 'Call this first' before programming operations and notes that no hardware connection is required. This provides clear context for when to use the tool, though it does not mention alternatives.

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

hold_in_resetA

Hold the target device in reset.

The device remains in reset until release_from_reset is called or the debugger is disconnected. Returns 'OK' on success.

ParametersJSON Schema
NameRequiredDescriptionDefault
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.5/5.0
Behavior3/5

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

With no annotations, the description carries full burden. It discloses the reset persistence and success return, but omits side effects, permissions, or any constraints beyond duration.

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?

The description is concise (two sentences plus return value note), front-loaded, and every sentence adds value without redundancy.

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?

Despite having an output schema, the description lacks parameter guidance for all 5 parameters and does not cover prerequisites or context for use. The tool's simplicity does not excuse missing parameter documentation.

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

Parameters1/5

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

Schema description coverage is 0%, and the description provides no explanation for any of the 5 parameters (device, tool, serialnumber, serialport, baudrate). The description fails to compensate for missing schema info.

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 action ('Hold the target device in reset') and resource. It explicitly distinguishes from sibling 'release_from_reset' by noting the reset persists until that call or disconnection.

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?

The description implies use for holding a device in reset and specifies the condition for release. However, it does not provide when-not to use or compare with other sibling tools (e.g., flash, erase).

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

list_connected_toolsA

Return a list of Microchip USB HID debuggers currently attached to the host.

Optionally filter by tool_name (e.g. 'nedbg', 'pickit4'). No device or session configuration is required.

ParametersJSON Schema
NameRequiredDescriptionDefault
tool_nameNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.4/5.0
Behavior4/5

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

No annotations provided, so description must carry burden. Declares it is a listing operation with no side effects and no configuration needed. Could mention return format, but output schema likely compensates.

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, no extraneous words. First sentence states core purpose, second adds key details. Highly efficient.

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?

Adequate for a simple listing tool with one optional parameter and an output schema. Missing edge cases like no tools found, but sufficient for typical use.

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?

Schema has 0% coverage for parameters; description adds optional filter semantics and concrete examples, significantly clarifying the parameter's purpose.

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?

Specific verb 'Return a list of Microchip USB HID debuggers' clearly identifies the tool's output. Distinguishes from sibling tools that perform actions on connected tools.

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?

States optional filter by tool_name with examples and explicitly notes no prior configuration required. Does not explicitly contrast with other tools, but context is clear.

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

list_supported_devicesA

Return a sorted list of all device names supported by pymcuprog.

No hardware connection is required. Use this to find the correct device name before calling any programming tool.

ParametersJSON Schema
NameRequiredDescriptionDefault

No parameters

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.2/5.0
Behavior3/5

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

With no annotations, the description carries full burden. It discloses that the list is sorted and that no hardware connection is needed, but does not mention any potential limitations or side effects. For a simple read-only list, this is adequate but not exceptionally detailed.

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

Conciseness4/5

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

The description is two sentences, front-loaded with the core purpose. It is concise and wastes no words, though it could be slightly tighter.

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

Completeness5/5

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

Given no parameters, an output schema exists (as per context signals), and the tool is simple, the description fully explains the tool's purpose and usage scenario. No additional information is needed.

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?

There are zero parameters, so baseline is 4. The description adds meaning by stating the result is sorted and the tool does not require hardware, which goes 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?

Clearly states the tool returns a sorted list of device names. The verb 'return' and resource 'device names' specify the action and output. It is distinct from sibling tools like list_connected_tools.

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 no hardware connection required and advises using this to find the correct device name before calling programming tools. It provides clear context for when to use it, though it does not explicitly exclude other uses.

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

pingB

Read the device signature bytes to confirm communication with the target.

Returns the device ID as a space-separated hex string (e.g. '0x1e 0x96 0x51'). Use this to verify the target is connected and responding before programming.

ParametersJSON Schema
NameRequiredDescriptionDefault
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.3/5.0
Behavior3/5

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

Without annotations, the description fully bears the transparency burden. It discloses the read nature and return format (hex string). However, it does not explicitly state that the tool is non-destructive or if it has any side effects, which would be helpful.

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?

The description is extremely concise (two sentences) and well-structured: first sentence states the action, second sentence describes output and usage. No extra words.

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?

Given the 5 undocumented parameters and no annotations, the description is incomplete. It fails to explain how to specify the target device or other connection details, which are essential for using the tool correctly.

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

Parameters1/5

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

The input schema has 5 parameters with 0% description coverage, and the description provides no explanation of any parameter. The agent has no guidance on what 'device', 'tool', 'serialnumber', 'serialport', or 'baudrate' mean or how to use them.

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

Purpose4/5

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

The description clearly states the tool reads device signature bytes to confirm communication. The verb 'Read' and resource 'device signature bytes' are specific. The usage phrase 'before programming' provides context, but it does not explicitly differentiate from sibling tools like 'list_connected_tools', which also checks connectivity.

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?

The description explicitly recommends using this tool 'before programming' to verify the target is connected and responding. This provides clear context, but it does not mention when not to use it or suggest alternatives.

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

read_memoryA

Read raw bytes from a target device memory area.

memory: one of 'flash', 'eeprom', 'fuses', 'user_row', 'signatures', 'lockbits', 'boot_row'. offset: byte offset within the memory to start reading (default: 0). length: number of bytes to read; 0 means read to end of memory (default: 0). Returns a JSON object with keys 'memory', 'offset', 'length', and 'hex' where 'hex' is a space-separated hex byte string.

ParametersJSON Schema
NameRequiredDescriptionDefault
memoryNoflash
offsetNo
lengthNo
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.5/5.0
Behavior3/5

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

With no annotations, the description only covers read operation basics and return format. It omits behavioral traits such as nondestructive nature, permission requirements, or potential side effects, leaving room for ambiguity.

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?

The description is concise, front-loaded with purpose, and uses a clear list for memory types. Every sentence adds value without redundancy.

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?

Despite explaining return JSON, the description neglects critical connection parameters and usage guidance. Given 8 parameters and many sibling tools, the description is incomplete for an agent to reliably invoke the tool.

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

Parameters2/5

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

Only 3 of 8 parameters (memory, offset, length) are described with meaning and defaults. The remaining 5 parameters (device, tool, etc.) are undocumented. Since schema coverage is 0%, the description fails to compensate for the missing parameter semantics.

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 'Read raw bytes from a target device memory area' and lists specific memory types (flash, eeprom, etc.), making the tool's purpose precise and distinguishable from siblings like write_memory or erase.

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

Usage Guidelines3/5

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

The description explains parameters and return format but does not explicitly state when to use this tool versus alternatives (e.g., read vs. verify_hex). Usage context is implied but not guided.

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

read_supply_voltageA

Read the debugger's onboard supply voltage setpoint.

Returns the current setpoint as a float string. Requires a USB HID debugger with onboard supply capability (e.g. Curiosity Nano).

ParametersJSON Schema
NameRequiredDescriptionDefault
toolNo
serialnumberNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.5/5.0
Behavior4/5

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

The description discloses return format (float string) and prerequisite hardware, which are key behavioral traits for a read-only tool. Since no annotations are provided, the description adequately covers the safety profile and constraints.

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

Conciseness4/5

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

Three sentences focus on purpose, output, and requirement. Front-loaded with the core action. Concise with no fluff, though could be slightly more efficient.

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

Completeness3/5

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

The description covers output format and hardware context, which partially compensates for missing parameter explanations. However, the lack of parameter documentation and error handling leaves gaps for a tool with an output schema.

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

Parameters1/5

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

With 0% schema description coverage, the description fails to explain the 'tool' and 'serialnumber' parameters. The agent has no guidance on how to populate these fields, limiting usability.

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 reads the debugger's onboard supply voltage setpoint, distinguishing it from sibling tools like read_target_voltage (which likely reads actual target voltage) and set_supply_voltage (write operation).

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

Usage Guidelines3/5

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

The description implies usage context via hardware requirement (Curiosity Nano) but does not explicitly guide when to use this tool over siblings like read_target_voltage. No when-not-to-use or alternatives are stated, leaving the agent to infer from names.

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

read_target_voltageA

Read the voltage on the target VCC pin as measured by the debugger.

Returns the measured voltage as a float string (e.g. '3.298'). Requires a USB HID debugger with voltage measurement capability. Does not require a target device or programming session.

ParametersJSON Schema
NameRequiredDescriptionDefault
toolNo
serialnumberNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.9/5.0
Behavior4/5

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

With no annotations, the description carries full burden. It discloses that the tool is a read operation, returns a float string, and has no destructive effects. It lacks details on potential errors or rate limits, but for a simple read it is sufficient.

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?

The description is three short sentences with no fluff. It is front-loaded with the core purpose and uses minimal words.

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 the presence of an output schema and the simplicity of the operation, the description covers the basic behavior and prerequisites. It could mention parameter roles for completeness, but is adequate.

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

Parameters1/5

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

The schema has 0% coverage and 2 parameters (tool, serialnumber) with no documentation in the description. The description does not explain what these parameters represent or how to use them, providing no added value over the 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 specific action: read the voltage on the target VCC pin via the debugger. This distinguishes it from the sibling tool 'read_supply_voltage' which presumably reads a different voltage.

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?

The description specifies prerequisites (USB HID debugger, no target device required) and implies the context for use. However, it does not explicitly compare to sibling tools or state when not to use this tool.

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

read_tool_infoB

Read hardware and firmware information from the connected debugger.

Returns a JSON object with fields such as fw_major, fw_minor, hw_rev, serial_number, and device_name. Requires a USB HID debugger; does not require a target device.

ParametersJSON Schema
NameRequiredDescriptionDefault
toolNo
serialnumberNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

B3.4/5.0
Behavior3/5

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

No annotations provided, so description carries full burden. Describes return format (JSON with specific fields) and hardware requirement, but lacks details on side effects or limitations.

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

Conciseness4/5

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

Three sentences, front-loaded purpose. Efficient but could be slightly more structured regarding parameters.

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?

Has output schema, so return values partially covered. Missing parameter usage explanation for two optional parameters. Incomplete for a tool with optional parameters.

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

Parameters1/5

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

Schema description coverage is 0%, and description makes no mention of the two parameters (tool, serialnumber). No added meaning beyond 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?

Clearly states 'Read hardware and firmware information from the connected debugger', specifying action and resource. Distinct from sibling tools like read_memory.

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 mentions requirement of USB HID debugger and that no target device is needed, providing clear context. Does not contrast with alternatives but gives enough guidance.

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

release_from_resetC

Release the target device from reset, allowing it to start executing.

Returns 'OK' on success.

ParametersJSON Schema
NameRequiredDescriptionDefault
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

C2.9/5.0
Behavior2/5

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

The description only states that it returns 'OK' on success. With no annotations, it fails to disclose side effects, failure behavior, idempotency, or dependencies (e.g., whether the device must be connected). This is insufficient for a hardware control tool.

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?

The description is extremely concise, consisting of two short sentences with no unnecessary words. It efficiently conveys the core action and success condition.

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?

Despite having an output schema, the description lacks critical context: how to identify the target device, what state it should be in, and what happens if the device is not in reset. With 5 undocumented parameters, the tool is far from sufficiently described for an AI agent.

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

Parameters1/5

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

The input schema has 5 parameters with 0% description coverage, and the description does not explain any of them. The agent receives no guidance on what 'device', 'tool', 'serialnumber', 'serialport', or 'baudrate' mean, making correct invocation nearly impossible.

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 action ('Release the target device from reset') and the outcome ('allowing it to start executing'). It distinguishes this tool from its sibling 'hold_in_reset' by describing the opposite operation.

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. There is no mention of prerequisites (e.g., device must be in reset state), when not to use it, or explicit comparison with sibling tools like 'hold_in_reset'.

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

set_supply_voltageA

Set the debugger's onboard supply voltage output (e.g. 3.3 or 5.0).

Returns 'OK' on success. Requires a USB HID debugger with onboard supply capability. WARNING: Ensure the target device supports the requested voltage before calling.

ParametersJSON Schema
NameRequiredDescriptionDefault
voltageYes
toolNo
serialnumberNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.9/5.0
Behavior3/5

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

No annotations are provided, so the description carries full burden. It states the return value ('Returns 'OK' on success') and includes a warning, but does not disclose potential error conditions, side effects, or required permissions. The behavioral disclosure is adequate but not rich.

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?

The description is three sentences long, front-loaded with the main action, and includes a warning. Every sentence adds essential information without redundancy.

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?

The description covers the primary purpose, a prerequisite, a return value, and a crucial warning. It is sufficient for a tool with one required parameter and an output schema (though not shown). However, it lacks details on error handling or the format of the voltage parameter.

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

Parameters2/5

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

With 0% schema description coverage, the description must add meaning for parameters. It provides example voltages for the 'voltage' parameter but does not explain the optional 'tool' and 'serialnumber' parameters. While the examples help, the lack of explanation for all parameters limits the added value.

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 specifies the action ('set'), the resource ('debugger's onboard supply voltage'), and provides concrete examples ('3.3 or 5.0'). It distinguishes this tool from sibling tools like 'read_supply_voltage' which reads instead of sets.

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?

The description includes a prerequisite ('Requires a USB HID debugger with onboard supply capability') and a critical warning about ensuring target device voltage compatibility. However, it does not explicitly state when not to use it or mention alternative tools.

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

verify_hexA

Verify that target device memory matches an Intel HEX file.

hexfile: absolute path to the .hex file on disk. Returns 'PASS' if memory matches, raises an error if it does not. Use after write_hex or to audit an already-programmed device.

ParametersJSON Schema
NameRequiredDescriptionDefault
hexfileYes
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A3.7/5.0
Behavior4/5

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

Describes return value 'PASS' and error on mismatch. No annotations provided, so description carries full burden; it adequately discloses behavior with no contradictions.

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?

Three concise sentences: purpose, parameter and return behavior, usage context. No wordiness, all sentences add value.

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?

While purpose and return are clear, the tool has 6 parameters and an output schema; description fails to address the connection-related parameters, leaving ambiguity about how to use the tool correctly.

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

Parameters1/5

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

Only hexfile is explained (absolute path). Five other parameters (device, tool, serialnumber, serialport, baudrate) are left undocumented despite 0% schema coverage. This is a major gap.

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?

Clearly states 'Verify that target device memory matches an Intel HEX file.' Verb+resource is specific and distinguishes from write_hex (write) and read_memory (read but no comparison).

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 'Use after write_hex or to audit an already-programmed device.' Provides clear context for when to use, though doesn't explicitly mention when not to use.

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

write_hexA

Write an Intel HEX file to the target device.

hexfile: absolute path to the .hex file on disk. erase_first: if True, performs a chip erase before writing. Default: False. verify_after: if True, reads back and verifies all written memory. Default: True. Returns 'OK' on success, raises an error if programming or verification fails. For the common case of a full firmware update, prefer the flash tool instead.

ParametersJSON Schema
NameRequiredDescriptionDefault
hexfileYes
erase_firstNo
verify_afterNo
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.2/5.0
Behavior4/5

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

No annotations exist, so the description must carry behavioral disclosure. It details return value ('OK' on success, error on failure) and the effects of erase_first and verify_after. Lacks context like device state prerequisites or error conditions, but covers core mutation traits adequately.

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?

Five sentences, zero wasted words. Front-loaded with action verb and resource, followed by essential parameter descriptions and usage guidance. Highly efficient.

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

Completeness3/5

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

Output schema exists but return values are described. However, missing parameter descriptions for 5 of 8 parameters and no guidance on when to prefer write_hex over write_memory (a sibling). Prerequisites or device connection state not mentioned. Adequate but incomplete for an 8-parameter tool.

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

Parameters2/5

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

Schema has 8 parameters with 0% description coverage. The description explains only 3 parameters (hexfile, erase_first, verify_after) via prose. The remaining 5 (device, tool, serialnumber, serialport, baudrate) are completely undocumented, leaving the agent uninformed about their purpose or defaults.

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 opens with a clear verb+resource statement: 'Write an Intel HEX file to the target device.' It distinguishes from siblings by noting 'prefer the flash tool instead' for full firmware updates, and implies a specialized role for Intel HEX files.

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

Usage Guidelines5/5

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

Explicitly states when to use alternatives: 'For the common case of a full firmware update, prefer the flash tool instead.' Also describes configurable behaviors (erase_first, verify_after) guiding selection of options.

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

write_memoryA

Write raw bytes to a target device memory area.

memory: memory area name (e.g. 'fuses', 'eeprom', 'user_row'). data_hex: bytes to write as a space-separated or 0x-prefixed hex string (e.g. '0xff 0x00 0xc8' or 'ff 00 c8'). offset: byte offset within the memory to start writing (default: 0). Returns 'OK' on success. Use for writing fuse bytes, EEPROM, or small memory regions. For full firmware images, prefer flash which handles address mapping.

ParametersJSON Schema
NameRequiredDescriptionDefault
memoryYes
data_hexYes
offsetNo
deviceNo
toolNo
serialnumberNo
serialportNo
baudrateNo

Output Schema

ParametersJSON Schema
NameRequiredDescription
resultYes

TDQS

A4.1/5.0
Behavior3/5

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

No annotations provided, so the description must carry the full behavioral burden. It describes the action as 'write raw bytes' and notes the return 'OK', but does not disclose safety aspects like potential destructiveness, permissions, or error conditions. Lacks warnings typical for write operations.

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?

The description is concise (5 lines), front-loads the main action, and every sentence adds value. No redundancy or fluff. Format with parameter explanations and usage note is well-structured.

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

Completeness3/5

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

Given the tool has 8 parameters (5 undocumented in description) and an output schema exists, the description covers the core functionality well but omits common parameters and does not address error behavior or constraints. Adequate for simple use but lacks depth for complex scenarios.

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?

Schema description coverage is 0%, so the description must compensate. It explains three key parameters (memory, data_hex, offset) with examples and defaults, but fails to mention five other parameters (device, tool, serialnumber, serialport, baudrate), leaving them undocumented. Adds value for the most important ones but incomplete.

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 'Write raw bytes to a target device memory area,' using a specific verb and resource. It distinguishes from sibling 'flash' by noting 'For full firmware images, prefer flash which handles address mapping,' and contextually differs from 'read_memory' and 'write_hex'.

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

Usage Guidelines5/5

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

Explicitly states when to use ('Use for writing fuse bytes, EEPROM, or small memory regions') and when not to ('For full firmware images, prefer flash'), providing clear alternatives. Also notes the return value, aiding decision-making.

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

TDQS

A3.7/5.0
Disambiguation4/5

Most tools have distinct purposes with clear descriptions, but there is some overlap between flash, write_hex, write_memory, and build_and_flash. The descriptions clarify differences, so agents can generally choose correctly.

Naming Consistency4/5

Tool names predominantly use snake_case with a verb_noun pattern, but some are single verbs (erase, flash, ping) and a few combine verb_verb (build_and_flash) or verb_prep_noun (hold_in_reset), creating minor inconsistencies.

Tool Count5/5

18 tools cover the full programming workflow—connection, programming, memory ops, voltage control, info—without being excessive. Each tool serves a distinct need for the domain.

Completeness5/5

The tool set covers build, erase, write, verify, read, reset, voltage control, and tool info. Missing specialized fuse/lockbit tools are mitigated by write_memory/read_memory, making the surface complete for typical use.

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