How many Agents do you think should be there in the organization? Many internal Departments (such as HR, Finance, Operations) want to have their own "agent" which solves their use cases and requirements. This might create a disorder and imagine having multiple agents with multiple names (and Logos). Should it be there only one Agent? Maybe this one connects in the back, with other agents? Keeping the Front end interaction simple with end users....

Here are some the steps that can helpful in the above scenario
1) Use MCP + A2A, ideal for modular, scalable “agent-of-agents” architecture.
2) One front-door agent for all user interactions; consistent brand and UX.
3) Back-end domain agents (HR, Finance, Ops, ITSM, etc.) handle specialized tasks via MCP.
4) A2A communication through standardized task/response schemas or a message bus.
5) Start with 5–9 agents total: 1 orchestrator + 3–5 domains + 1–3 utility (search, workflow, safety).
6) Governance required: agent registry, RBAC, policy checks, audit logs, and naming conventions.
7) Avoid multiple user-facing agents, as they cause confusion, duplication, and compliance risks.
8) Enforce safety & quality: redaction, human-in-loop, versioning, and observability.

That depends on your company size and verticals. for big organisations its common for different departments to have specialised agents to solve unique use cases. However there should be a common place for knowledge, monitoring and observability. Keeping one agent with multiple use cases might become tricky to manage and update.
Best idea is to have a federated model to have common functions across org and then tailored with specific needs.