This server presents 19 tools for Tencent Cloud COS (object storage) and CI (image/media/document processing) operations. While schemas are present and descriptions exist, quality is inconsistent. Naming follows verb_noun patterns well (get*, put*, create*, etc.), but descriptions are often minimal (10-50 chars) and lack context about when to use each tool or what happens next. Parameters have type definitions via Zod, but many lack meaningful descriptions, parameter descriptions are often just field names repeated or minimalist. Output schemas are undocumented; responses are hardcoded to JSON stringification with no clear field contract for agents. Security is a concern: the server masks secrets in responses (maskSecret function) but does not validate that credentials are never exposed as parameters, config appears to be passed server-side which is correct, but getCosConfig returns a stringified config object, leaking SecretId/SecretKey fields (even if masked) into response content. Error handling returns isError flags and JSON responses but lacks guidance for LLM recovery, no categorization of retryable vs. fatal errors. Composition is weak: many tools do similar things (putObject, putString, putBase64, putBuffer) without clear guidance on which to use when. Output pagination and limits are not addressed. Overall, this is a functional but unprofessional toolkit that would benefit from stricter description standards, clearer parameter contracts, documented output schemas, and security hardening.

• Document output schema for every tool. Include example response structure with field names, types, and descriptions. This is critical for agent planning.
• Expand parameter descriptions to 50-150 characters. Explain what the parameter controls, valid ranges/formats, and how it affects the tool's behavior. Example: 'targetDir (string): Destination directory in the bucket. Use empty string or omit for root. Must start with / if provided.'
• Consolidate or clarify the four put* tools. Consider: (1) merge into a single putObject with a 'contentType' enum, or (2) keep separate but add a description table comparing when to use each (e.g. 'Use putObject for files, putString for text content, putBase64 for binary data encoded as base64, putBuffer for raw binary data').
• Add pagination to getBucket: include limit (default 20, max 100) and marker/offset parameters. Return total count and next_marker in response. Document this in the description.
• For async tools (createDocToPdfJobs, createMediaSmartCoverJob), document the response format (job_id, status) and add a companion polling tool (getJobStatus) to check progress. Explain typical processing times.
• Remove getCosConfig tool or redesign it: do not return SecretId/SecretKey in response, even if masked. Instead, return only non-sensitive config (Bucket, Region, DatasetName) or omit the tool entirely if it's only for debugging.
• Improve error messages. Instead of returning isError: true and raw JSON, return structured errors: {"error": "invalid_input", "message": "objectKey must point to an image, got 'file.txt'", "recovery": "Use imageInfo to check file type first."}