ga4_update_data_stream

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

There are no annotations, so the description carries the full burden of behavioral disclosure. It conveys that the operation is a mutation and adds the 'web streams only' constraint for default_uri, but it does not mention the confirm parameter, side effects, permission requirements, or whether the update is partial or full replacement.

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 a single, efficiently worded sentence with the main action front-loaded and no filler. It is appropriately concise, though the terseness contributes to the completeness gaps elsewhere.

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?

With five parameters, no annotations, and 0% schema description coverage, the description is too thin for an agent to invoke the tool with confidence. It omits the purpose of the required stream_id, the optional property_id, and the confirm flag. The output schema exists, so return values need not be explained, but the input-side gaps remain significant.

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%, so the description must compensate, but it only adds meaning to display_name and default_uri. It leaves stream_id, property_id, and confirm unexplained, and it does not clarify how property_id relates to stream_id or why confirmation is required.

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 ('Update') and resource ('a data stream'), and narrows the scope to display name or default URI. This is enough to distinguish it from sibling tools like ga4_create_data_stream, ga4_delete_data_stream, and ga4_update_property.

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 implies when to use the tool (when a data stream's display name or web default URI needs changing), but it does not explicitly state when not to use it or name alternative tools. Unlike higher-scoring definitions, it offers no routing guidance between ga4_update_data_stream and ga4_update_property.

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