modx_create_system_setting

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

No annotations are provided, so the description carries the full behavioral burden and delivers nothing. It does not say whether this mutates persistent config, whether it requires admin permissions, what happens on duplicate keys, whether the setting takes effect immediately or needs a cache clear, or what the response contains.

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

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

The single sentence is technically concise and front-loaded, but this is under-specification rather than economical writing. Nothing is wasted because nothing useful is said beyond restating the tool name.

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

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

For a five-parameter mutation tool with no annotations, no output schema, and zero schema documentation, the description should explain parameter formats, key uniqueness behavior, and side effects. It provides none of this, making the definition inadequate to call the tool correctly.

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

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

Schema description coverage is 0% across five parameters (key, area, value, xtype, namespace), and the description adds no meaning at all. An agent has no idea what 'area', 'xtype', or 'namespace' accept, nor what 'key' format is expected, so the schema and description are both silent.

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

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

The description states a specific verb and resource ('Create a MODX system setting'), which is unambiguous on its own. However, it makes no attempt to distinguish this from modx_update_system_setting, modx_create_context_setting, or modx_clientconfig_create_setting, which sit in the same namespace and are easy to confuse.

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

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

There is no when-to-use guidance, no mention of prerequisites (e.g. that the key must not already exist, or that modx_update_system_setting should be used for existing keys), and no reference to any alternative. The agent is left to infer routing from the tool name alone.

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