update_submodel_element_value

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

There are no annotations, so the description must carry the behavioral disclosure burden. It discloses the HTTP method and path, showing that it performs a partial update of the value property. However, it does not mention permissions, side effects, or error behavior, leaving gaps typical of mutation tools without annotations.

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 description is highly concise with two sentences: the first states the action, and the second gives the REST mapping. There is no filler or redundancy, and the key information is front-loaded.

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?

Given no annotations, no output schema, and potentially confusing sibling tools, the description anchors the operation precisely via the HTTP endpoint. It lacks explicit return value or error information, but the purpose and differentiation are sufficient for basic usage. Some additional guidance on exclusions would make it complete, but it is not inadequate.

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?

The input schema has 100% coverage with each of the 5 parameters described, so the baseline is 3. The tool description adds no extra parameter information beyond what the schema already provides, but the schema is sufficient on its own.

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 clearly states the tool updates the value of a Submodel element, using the verb 'Updates' and specifying the exact resource. The REST endpoint PATCH /submodels/{submodel_id}/submodel-elements/{id_short_path}/$value distinguishes it from sibling tools like update_submodel_element, which likely updates element metadata rather than just the value.

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?

The description provides the specific REST endpoint, indicating this tool is for value-only updates of a Submodel element. This gives clear context on when to use it, though it does not explicitly exclude alternatives or name sibling tools such as get_submodel_element_value or update_submodel_element.

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