Skip to main content
Glama

ads_read_raw

Read-only

Read raw ADS data by index group and offset from any TwinCAT port, returning hexadecimal and little-endian uint values for low-level PLC memory inspection.

Instructions

Raw ADS read by index group/offset on any port (hex + little-endian uint).

Input Schema

TableJSON Schema
NameRequiredDescriptionDefault
portNo
sizeYes
ams_net_idNo
index_groupYes
index_offsetYes

Output Schema

TableJSON Schema
NameRequiredDescriptionDefault

No arguments

Schema Changelog

Changes observed during successful MCP inspections.

  1. First observedv0.6.0

TDQS

C2.9/5.0
Behavior3/5

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

Annotations already declare readOnlyHint=true and destructiveHint=false, so the safety profile is covered. The description adds that reads are raw, address-based, usable on any port, and mentions hex/little-endian uint output, but it does not clarify that parenthetical or disclose connection requirements or error behavior.

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?

A single front-loaded sentence with no padding. The parenthetical is terse but cryptic, slightly reducing clarity rather than adding useful structure.

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?

Although output schema exists and annotations cover safety, the description is too thin for a five-parameter raw-read tool. It omits meaning for size and ams_net_id and gives no sibling comparison or usage context.

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 names index_group, index_offset, and port, but says nothing about required size or optional ams_net_id, leaving two of five parameters undocumented.

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?

States a specific verb and resource: 'Raw ADS read' by index group/offset on any port. This implicitly distinguishes it from higher-level reads like ads_read, but it never names or explicitly contrasts with any sibling tool, so it falls short of a 5.

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?

Provides no when-to-use guidance, no alternatives, and no exclusions. An agent learns what the tool does, but not when to choose it over ads_read, ads_read_many, or ads_io_read.

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

Deploy Server

Other Tools