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

Annotations already declare readOnlyHint=false, idempotentHint=true, destructiveHint=false, and openWorldHint=false, so the mutation and safety profile is largely covered. The description adds that the operation attaches a property or watch folders, but says nothing about auth requirements, what happens to previously set properties/folders, or how removeFolderIds interacts with addFolders.

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?

Two short sentences, front-loaded with the purpose and followed by the key parameter hint and related tools. Efficient, though the parenthetical provider list slightly duplicates schema content.

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 a full schema, annotations covering the safety profile, and an output schema present, the description only needs to state purpose and connectionId provenance — both of which it does. Nothing essential for correct invocation is missing.

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 100%, so the baseline is 3. The description restates the connectionId sourcing ('Pass connectionId from list_connections') and names the accepted provider values, which the schema already conveys, but adds no syntax or format detail beyond the schema.

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 gives a specific verb ('Saves') and enumerates the resource types: Search Console or GA4 property, or Drive folders to watch. It is distinguishable from siblings like list_connections and sync_connections, though 'Saves' is slightly loose for a tool named update_connection_settings.

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?

It tells the agent where connectionId comes from (list_connections) and lists the related tools, which is useful routing context. However it never states when to use this versus sync_connections or disconnect_connection, nor any preconditions or exclusions, so guidance is implied rather than explicit.

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